My Science School

TECHNOLOGY: Though the year 2022 saw the routine rounds of gadget launches-from upgraded cellphones to smart watches, the big surprise came in the form of some tech-related news that made it to the front pages. Remember Elon Musk turning chief twit, mass global lay-offs by companies, an Al tool that mimics the human brain, and the crypto collapse?

1. 5G, finally!

Prime Minister Narendra Modi officially announced the launch of the first phase of 5G services in 13 cities across the country, at the India Mobile Congress event in New Delhi, in October 2022. 5G is the fifth-generation technology standard for broadband cellular networks. "5G technology will provide seamless coverage, high data rate, low latency and highly reliable communications. It will increase energy efficiency, spectrum efficiency and network efficiency," he tweeted. The cumulative economic impact of 5G on the country is expected to touch $450 billion by 2035. The 5G coverage will progressively cover the entire country over the next couple of years.

2. Fried!

Sam Bankman-Fried's crypto empire collapsed in November 2022. The reason - a run-on deposit that left his crypto exchange FTX with a shortfall of $8 billion. This forced FTX to file for bankruptcy, and the company struggled to raise money to stall its collapse as traders rushed to withdraw $6 billion in less than 72 hours! Fried was arrested in the Bahamas after being criminally charged by the U.S. prosecutors. The shocking end to the successful FTX story had a rippling effect across the already shaken crypto industry, destabilising other companies and spreading distrust among the public about the technology.

3. Did it sink in?

Elon Musk dominated the headlines by first announcing his bid to buy Twitter and then backing out. Eventually, the Tesla and Spacex chief was forced to honour the agreement, and he took over the microblogging platform in October 2022 for $44 billion. Top executives left the company or were fired. Twitter also made mass global lay-offs. But confusion prevailed on the site. He courted controversy by reinstating Donald Trump's account, introducing paid blue ticks, and banning some journalists from the site. After conducting a poll on whether he must step down as Twitter CEO, in true Musk style, he said he'll do so when he finds "someone foolish enough to take the job".

4. ChatGPT

It answers the most complicated questions, writes sonnets, creates computer codes, and even comes up with interesting menus! Welcome to the world of Generative Pre-trained Transformer, ChatGPT for short. Launched by the American firm OpenAl in November 2022, the Al tool is today used by millions to generate a variety of content- all in a few seconds or minutes! ChatGPT isn't without flaws. Biases in certain communications have already been reported. It robs us of the creative process - particularly in communication. Can it replace human ingenuity? The verdict isn't out yet, but enthusiastic folks are already having a lot of fun with this chatbot that's said to mimic the human brain.

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On February 5, 1971, Apollo 14 made a successful landing on the lunar surface, thereby becoming the third human landing on the moon after Apollo 11 and Apollo 12.

When we talk about the Apollo programme, it is often hard to look beyond the Apollo 11 mission, which achieved the distinction of landing the first humans on the moon. Even though the Apollo programme is best remembered for this, it should also be noted that it provided for innumerable demonstrations of ingenuity and problem solving and increased NASA's expertise by leaps and bounds.

Following the success of Apollo 11 in July 1969, Apollo 12 landed humans on the moon in November 1969. Apollo 13, however, had to be aborted following an oxygen tank explosion in the service module.

This meant that the Fra Mauro Formation, originally planned to be the lunar landing site for Apollo 13, served as the landing site for Apollo 14, once NASA had completed an accident investigation and upgraded the spacecraft.

Shepard, Mitchell, and Roosa

Launched on January 31, 1971, Apollo 14 had a three-member crew that included commander Alan Shepard, lunar module pilot Edgar Mitchell, and command module pilot Stuart Rossa. Even though there was a potential short circuit in an abort switch on the lunar module and the landing radar came on very late during the landing sequence, Shepard and Mitchell successfully landed on the lunar surface on February 5. In fact, it was the most precise landing until then, as they landed less than 100 feet from the targeted point.

Shepard and Mitchell spent over 33 hours on the moon, including two extra vehicular activities (EVAS) that spanned nine hours and 23 minutes. Even though the first of the two EVAS began an hour later than scheduled due to communications systems problems, it turned out to be a success.

Modular Equipment Transporter

The first EVA was mainly to deploy a number of experiments and some of these sent back data to Earth until September 1977. While a seismometer detected thousands of moonquakes and helped find out the moon's internal structure, other instruments looked at the composition of solar wind and the moon's atmosphere.

Apart from the safety upgrades that were done for Apollo 14, there was also the addition of the Modular Equipment Transporter (MET). While Apollo 11 astronauts carried their tools by hand and Apollo 12 astronauts used a hand tool carrier, Shepard and Mitchell could employ the MET like a wheelbarrow, stowing away their scientific equipment, tools, camera, and sample collections.

During the duo's second EVA dedicated to explore the Cone Crater, the MET came in handy as they were able to pick up a football-sized rock, designated 14321, but better known by its nickname "Big Bertha". Using the MET, the astronauts were able to transport this sample back to the lunar module. As recently as 2019, studies suggested that a two-cm sliver of the Big Bertha might have originally come from the Earth's crust, and not the moon.

42 kg of samples

Even though the crew never saw the interior of the crater, post-mission comparisons showed that Shepard and Mitchell were within 50-75 m from the crater rim. The round trip lasted four hours and 35 minutes in which the duo traversed nearly 3 km, including samples from the first EVA, the duo had collected 42 kg of lunar samples.

While Shepard and Mitchell were busy on the lunar surface, Roosa, who was in the command module, clicked many pictures in high resolution. These photographs of the moon's Descartes region played a pivotal role in certifying the area's safety as a landing site and even helped plan rover traverses for the Apollo 16 mission.

Liftoff from the lunar surface took place exactly on schedule, while rendezvous and docking with the command module was just two minutes off schedule. After spending 2.8 days in lunar orbit, during which time the command module had circled the moon 34 times, the Apollo 14 crew members headed back to Earth. They splashed down safely in the Pacific Ocean on February 9, exactly nine days and two minutes after launch.

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On May 21, 1853, the first public aquarium was opened as part of the London Zoo. First called the "Fish House" in Regent's Park Zoological Gardens, it was made possible by English naturalist Philip Henry Gosse.

On any occasion when you’ve seen an aquarium, have you ever thought about how it came to be? No, not that particular aquarium that you visited or saw at someone's house. We are talking about the entire concept of aquariums as a vivarium of any size to house aquatic plants and animals.

The idea, in fact, is less than 200 years old. While a number of people were involved in the invention of the marine aquarium, English naturalist Philip Henry Gosse is credited with promoting the glass tank as a novel way of housing marine creatures. What's more, he was also responsible for using "aquarium" for this glass vessel, a term that still remains in use. 

Love for natural history

 Born in Worcester, England in 1810, Gosse was the son of Thomas and Hannah Gosse. Even as a boy, Gosse explored the sea life around Poole, a coastal town in southern England. His love for natural history awakened very early, he was encouraged by his aunt Susan Bell to observe and draw wildlife.

It was from his aunt Bell that Gosse learned about the metamorphosis of insects and the name of the common red sea anemone. Bell even suggested to Gosse that he should try to keep sea anemones alive in vessels of fresh seawater- an inception of sorts for an idea that he later championed. Gosse also took scientific inspiration from Bell's son Thomas, a naturalist who went on to become professor of zoology at King's College, London.

Finding his way across the Atlantic to Newfoundland, Canada, Gosse became a clerk in a seal-fishery at Carbonear harbour in 1827. In his early twenties, Gosse began to collect and document insects wholeheartedly in his spare time. When a couple of ventures he tried in Canada failed, he Books give him voice

Having received an invitation from a society to write An Introduction to Zoology, his research led him to write another, The Ocean. The unexpected success of his books earned him a fully-financed collecting expedition to Jamaica and his time there led to several more books. By this time, Gosse had not only developed the nuances of being a naturalist, but had also established himself as an important voice in the field.

By the 1840s, Gosse was collecting marine specimens in earnest, going about his business in two main fashions. As the eroding tides had created habitats for diverse lifeforms in the geologically varied shores of Dorset and Devon, Gosse explored these areas on foot. Additionally, he also collected marine species by coastal dredging from a boat.

By combining his love of observing with collecting, studying, drawing, and writing, Gosse became a Goliath in the field. He knew that in order to create reliable records that captured public imagination and led to scientific progress, he needed to keep his collection in good health and have a clear view of them. And so it was that Gosse became an authority in setting up a home-based aquarium, making artificial seawater, and even maintaining the set-up.

World's first public aquarium

It therefore comes as no surprise that Gosse was one of the most important people in setting up the first public aquarium in the world. Called the "Fish House", it was set up in Regent's Park Zoological Gardens as part of the London Zoo and thrown open to the public on May 21, 1853.

In his 1853 book A Naturalist's Rambles on the Devonshire Coast, the word "vivarium" was used interchangeably with "marine aquarium". A year later, however, Gosse firmly believed that "aquarium" best described it. He mentioned that the word should be "neat, easily pronounced and easily remembered" in his 1854 book The Aquarium: An Unveiling of the Wonders of the Deep Sea, thereby setting it stone.

Additionally, he also stated the following: "Let the word AQUARIUM then be the one selected to indicate these interesting collections of aquatic animals and plants, distinguishing it as Freshwater Aquarium, if the contents be fluviatile, or a Marine Aquarium, if [the contents are salt water-based]."

Against evolutionary concepts Gosse was a contemporary of celebrated English naturalist Charles Darwin and the latter even turned to Gosse when setting up an aquarium of his own. Even though a lot of their work actually overlapped, Gosse firmly rejected the evolutionary concepts proposed by Darwin owing to his own religious beliefs.

Even though his creationist theories marginalised him, Gosse spent his entire lifetime observing the world around him, until his death in 1888. His work and practical contributions to marine zoology were important to the scientific establishment of his times. And the aquariums that he envisioned still enable us to bring a tiny slice of ocean life home.

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From medical examinations and airport screenings to space missions, X-rays have been used everywhere since its discovery by German physicist Wilhelm Roentgen in 1895. A group of scientists from Ohio University, Argonne National Laboratory, the University of Illinois-Chicago, and others, have now taken the world's first X-ray signal (or signature) of a single atom. The groundbreaking achievement could revolutionise the way in which scientists detect the materials.

One atom at a time

Before this, the smallest amount one can X-ray a sample is an attogram, which is about 10,000 atoms or more. The paper brought out by the scientists was published in the scientific journal Nature on May 31, 2023 and also made it to the cover of the print edition on June 1. The paper details how physicists and chemists used a purpose-built synchrotron X-ray instrument at the XTIP beamline of Advanced Photon Source and the Center for Nanoscale Materials at Argonne National Laboratory.

Specialised detector

The team involved picked an iron atom and terbium atom for their demonstration. Both atoms were inserted in respective molecular hosts. Conventional detectors were supplemented with a specialised detector by the research team.

This specialised detector was made of a sharp metal tip. It is positioned at extreme proximity to the sample, enabling it to collect X-ray excited electrons. This technique is known as synchrotron X-ray scanning tunnelling microscopy or SX-STM.

Apart from achieving the X-ray signature of an atom, the team also succeeded in another key goal. This was to employ their technique to find out the environmental effect of a single rare-earth atom.

The scientists were able to detect the chemical states of the individual atoms inside respective molecular hosts and compare them. While the terbium atom, a rare-earth metal, remained rather isolated and didn't change its chemical state, the iron atom interacted with its surrounding strongly.

Many rare-earth materials are used in everyday devices like cell phones, televisions, and computers. This discovery allows scientists to not only identify the type of element, but also its chemical state. Knowing this enables them to work on these materials inside different hosts, paving the way for further advancement of technology.

This team aims to continue to use X-ray to detect properties of a single atom. They are also seeking ways to revolutionise their applications so that they can be put to use in critical materials research.

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On June 11, 1963, the Mercury space capsule was patented and assigned to NASA. The patent was received less than a month after the last flight of Project Mercury had been carried out.

Receiving a patent generally signals a major milestone. As an exclusive right granted for an invention, be it a product or a process, it usually denotes a new way of doing something, thereby becoming important. In the case of the Mercury space capsule, however, the patent came closer to the end.

Project Mercury was conceived as a NASA programme to put the first American astronauts in space. Named after a Roman god who was very fast, the project notched up many successes. At the centre of this success was the Mercury space capsule.

"Space capsule"

The principal designer of the Mercury spacecraft was Maxime Faget, a mechanical engineer who also contributed to the designs of the Gemini and Apollo spacecraft. Faget, along with Andre Meyer, Robert Chilton, Willard Blanchard Jr., Alan Kehlet, Jerome Hammack and Caldwell Johnson filed for a patent titled "Space capsule" on October 16, 1959.

In this patent application, they described their invention relating to space vehicles as a "manned capsule configuration capable of being launched into orbital flight and returned to the Earth's surface."

Additionally, it was capable of providing "protection for its occupant from the deleterious effects of large pressure differentials, high temperatures, micrometeorite collisions, high level acoustical noise, and severe inertial and impact loads."

Not cosy

It did all that, but the capsule was a rather small one, with room for just one astronaut. What's more, this astronaut had to stay seated throughout the flight. While there was very little room for even the single seated astronaut to make any movements, it was argued that not much was required as the pilot would only need to move his arms and head, and was to never leave the spacecraft during flight.

Following uncrewed flights and those with primates as part of Project Mercury, the first crewed flight took place on May 5, 1961. Alan Shepard made the first crewed Mercury flight in a capsule that he named Freedom 7. The 15-minute flight that went into space and came back down made him the first American in space.

Between 1961 and 1963, there were six successful flights as part of Project Mercury that showed that Americans could fly in space. While two of these flights were suborbital flights (reached space and came right back down), the other four made it into orbit and circled our Earth.

Every time the Mercury spacecraft re-entered the Earth's atmosphere, the blunt end came in first to not only slow down the spacecraft, but also shed the heat caused by friction with the air during the descent. With layers of heat resistant ablative resins coating the curved heat shield, it charred away to minimise structural heating, preventing damage to the spacecraft, and of course, protecting the crewman.

The last of the six successful crewed Mercury Project spaceflight took place on May 15, 1963. Each of these flights lasted from 15 minutes to 34 hours, with most lasting less than nine hours.

Just a formality

This meant that by the time the patent for the Mercury capsule was awarded on June 11, 1963, it had already been put to use multiple times successfully, with each of the successes celebrated by an entire country. The patent, which was assigned to NASA, was merely a formality.

In fact, NASA retired the Mercury capsule in the same week in which the patent was awarded. The first manned space vehicle of the U.S. was retired with honours of course, having been central to a project that came at the height of the space race between the U.S. and the Soviet Union.

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On June 4, 1872, American chemist Robert Chesebrough was granted a patent titled "Improvement in products from petroleum". Chesebrough mentioned the name with which he marketed petroleum jelly in this patent, which is now a brand name.

Whenever you had minor skin scrapes and burns, or just had to moisturise your face, hands, or other parts of the body, chances are that you probably used petroleum jelly. Yes, the folks around you or the elders at home probably referred to it with its brand name, but if you look at what it is made of, you will realise that it is petroleum jelly.

For one-and-a-half centuries now, petroleum jelly has played a pivotal part in skincare, be it to help with skin moisturising or healing. Also called petrolatum, petroleum jelly is a mixture of mineral oils and waxes that forms a semisolid jelly-like substance. Ever since American chemist Robert Augustus Chesebrough discovered it in the 19th Century, the product hasn't changed much.

His job turns obsolete        

A British-born American chemist, Chesebrough owed his discovery to serendipity. He began his career as a chemist distilling kerosene from the oil of sperm whales. This role, however, soon turned obsolete with the discovery of petroleum in Titusville, Pennsylvania.

Now jobless, Chesebrough decided to travel to Titusville. He decided to research the new fuel to see what new materials might be created from it. Strolling around the oil field, Chesebrough came across something called rod wax, also known as petroleum jelly.

A byproduct of oil drilling, the jelly-like substance was cleaned off from the pumping equipment often. The workers told Chesebrough that it was largely a nuisance, except for one particular use. When someone had a cut or a burn, rubbing the wax on the injured area not only reduced the pain, but also allowed the injury to heal quickly.

Refines the process

Chesebrough set off back to his chemistry lab in Brooklyn with a batch of rod wax. He began experimenting and refining the process by which the wax was generated in order to come up with a solution that healed and protected the skin.

He spent the following years perfecting the technique of extracting a colourless, odourless form of petroleum jelly. By 1865, Chesebrough patented his purification method. This marked the beginning of triple-distilled petroleum jelly products, which remains the norm till this day.

By 1870, Chesebrough began distributing this pure petroleum jelly under the brand name Vaseline. He opened a factory in Brooklyn that same year and even promoted his "miracle" product by touring the entire State in a horse-driven carriage.

On June 4, 1872, Chesebrough received U.S. patent 127568A titled "Improvement in products from petroleum". In this, Chesebrough mentions that he has "invented a new and useful Product from Petroleum, which I have named Vaseline".

Even before Chesebrough started to sell his petroleum jelly, he had tested it on himself for his own cuts and burns. Despite his firm belief in the product and its efficacy, Chesebrough was still unable to sell these to drug stores.

Daredevil marketing

Things changed, however, when he demonstrated his "wonder jelly" in an extreme fashion. Chesebrough started to burn his skin with acid or an open flame in front of the gathered audience, before dabbing the clear jelly on his injuries. He would then demonstrate his past injuries, healed, he would claim, by his "miracle" product. He also gave out free samples to further increase demand.

Chesebrough's daredevil acts worked as a tin of his product was being sold every minute in the U.S. by 1874. They continue to work till this day as the brand name he coined is now a household name, used to refer to pure petroleum jelly itself rather than just the product.

But then, Chesebrough’s belief in the product was so sound that he actually ate a spoonful of it every day until his death aged 96, according to Ripley’s Believe It or Not! The next time you use the product, be sure to tell the tale to those around you, but please don't take it to your mouth!

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Hundreds of new UFO reports, but...there is still no evidence of aliens. The Pentagon, the headquarters of the United States Department of Defense, has set up a new office to track reports of UFO sightings and collect data.

What are UFOs?

A new Pentagon office set up to track reports of unidentified flying objects (UFOS) has received "several hundreds" of new reports. What are UFOS? Over the centuries, people have reported seeing strange airborne objects or unusual optical phenomena in the sky. These are called UFOS. Over the years, the belief that UFOs are the spaceships of aliens from other planets has gained ground - though without any concrete evidence. Are there possibilities of extraterrestrial life? Shouldn't the sightings be tracked systematically? Well, that's why the All-domain Anomaly Resolution Office (AARO) was formed.

2. What is AARO?

The AARO was set up in July 2022 to track unidentified objects in the sky, underwater and in space. It was established following more than a year of attention on unidentified flying objects that military pilots have observed.

It focusses on unexplained activity around military installations, restricted airspace and "other areas of interest" and is aimed at helping identify possible threats to the safety of U.S. military operations and to national security.

3. Scientific approach

Sean Kirkpatrick, director, AARO, did not rule out the possibility of extraterrestrial life and said he was taking a scientific approach to the research. Since the launch of the AARO, there have been several hundred new reports.

"We are structuring our analysis to be very thorough and rigorous. We will go through it all. And as a physicist, I have to adhere to the scientific method."

4. No alien life

The U.S. military officially calls the 144 sightings observed between 2004 and 2021 as "unidentified aerial phenomena."

But they have seen nothing that indicates alien life. "I have not seen anything that would suggest that there has been an alien visitation, an alien crash or anything like that," said Ronald Moultrie, Under Secretary of Defense for Intelligence and Security.

5. Quick facts

The Air Force conducted an investigation into UFO activity called 'Project Blue Book’. It ended in 1969 with a list of 12,618 sightings, 701 of which involved objects that officially remained "unidentified."

In 1994, it concluded that the 1947 famous "Roswell incident" in New Mexico, was not an UFO but a crashed balloon, the military's long-standing explanation.

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A new method has been developed by researchers that allows a flapping-wing robot to land on a horizontal perch using a claw-like mechanism.

Mimicking nature has allowed us to master many things. The sight of a bird landing on a branch makes it seem like the manoeuvre is probably the easiest thing in the world. The act of perching, however, is far from easy. It involves a delicate balance of timing, high-impact forces, speed, and precision.

The move is so complex that no flapping-wing robot or ornithopter has been able to achieve it so far. That has changed now with researchers from the Ecole Polytechnique Federale de Lausanne, Switzerland along with colleagues at the University of Seville, Spain being able to achieve it in a controlled environment. The results of the study have been published in Nature Communications in December 2022.

Engineering challenges

The engineering challenges for an ornithopter included slowing down significantly as it perched while still maintaining flight; building a claw strong enough to support its weight while grasping and perching, without being too heavy that it can't be held aloft; and being able to perceive its environment with respect to its own position, speed, and trajectory.

By equipping their ornithopter with a fully on-board computer and a navigation system that was complemented by a motion-sensor system, the researchers were able to overcome all these challenges. Once perched, the robot was able to remain perched, without expending energy.

Next up, unpredictable environment

The flight experiments were carried out indoors so that the flight zone could be a more controlled environment. The next task is to increase the robot’s autonomy to perform these perching and manipulation tasks outdoors in uncontrolled environments.

Once that is achieved, these ornithopters would be ready for more real word applications, such as unobtrusively collecting biological samples or measurements from a tree. This is because ornithopters, like many unmanned aerial vehicles (UAVs). have limited battery life. The ability to land on a perch would enable flapping-wing robots to possibly recharge using solar energy, making them viable options for long-distance missions.

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Mars rover’s microphone captures ten seconds of rumbling noise created by dust devil on the Red Planet. It's the same microphone that provided the first sounds of Martian wind in 2021.

What does a dust devil sound like on Mars? A NASA rover by chance had its microphone on when a whirling tower of red dust passed directly overhead, recording the racket.

It's about 10 seconds of not only rumbling gusts of up to 40 kph, but the pinging of hundreds of dust particles against the rover Perseverance. Scientists released the first-of-its-kind audio. It sounds strikingly similar to dust devils on Earth, although quieter since Mars' thin atmosphere makes for more muted sounds and less forceful wind, according to the researchers.

The dust devil came and went over Perseverance quickly last year, thus the short length of the audio, said the University of Toulouse's Naomi Murdoch, lead author of the study appearing in Nature Communications.

At the same time, the navigation camera on the parked rover captured images, while its weather-monitoring instrument collected data.

"It was fully caught red-handed by Persy," said co-author German Martinez of the Lunar and Planetary Institute in Houston.

Photographed for decades at Mars but never heard until now, dust devils are common at the red planet.

This one was in the average range: at least 400 feet (118 metres) tall and 80 feet (25 metres) across, travelling at 16 feet (5 metres) per second.

The microphone picked up 308 dust pings as the dust devil whipped by, said Murdoch, who helped build it.

Given that the rover's SuperCam microphone is turned on for less than three minutes every few days, Murdoch said it was "definitely luck" that the dust devil appeared when it did on Sept. 27, 2021. She estimates there was just a 1-in-200 chance of capturing dust-devil audio. Of the 84 minutes collected in its first year, there's "only one dust devil recording," she wrote in an email from France.

WHAT IS A DUST DEVIL?

• Common across Mars, dust devils are short-lived whirlwinds loaded with dust that form when there is a major difference between ground and air temperatures.
• They are a common feature in the Jezero crater, where the Perseverance rover has been operational since February 2021 - but it had never before managed to record audio of one of them.
• By chance on September 27, 2021, a dust devil 118 metres high and 25 metres wide passed directly over the rover.
• This time, the microphone on the rover's SuperCam managed to catch the muffled, whirring sounds.

Sounds...so far

• The same microphone on Perseverance's mast provided the first sounds from Mars namely the Martian wind soon after the rover landed in February 2021.
• It followed up with audio of the rover driving around and its companion helicopter, little Ingenuity, flying nearby, as well as the crackle of the rover's rock-zapping lasers, the main reason for the microphone.

ROCK SAMPLES

On the prowl for rocks that might contain signs of ancient microbial life, Perseverance has collected 18 samples so far at Jezero Crater, once the scene of a river delta. NASA plans to return these samples to Earth a decade from now. Its helicopter Ingenuity has logged 36 flights, the longest lasting almost three minutes.

CAN ACOUSTIC DATA SOLVE THE MARTIAN MYSTERY?

• These recordings allow scientists to study the Martian wind, atmospheric turbulence and now dust movement as never before.
• The impact of the dust-made "tac tac tac sounds will let researchers count the number of particles to study the whirlwind's structure and behaviour.
• It could also help solve a mystery that has puzzled scientists. On some parts of Mars, whirlwinds pass by sucking up dust, cleaning the solar panels of rovers along the way.
• Understanding why this happens could help scientists build a model to predict where the whirlwinds might strike next.
• It could even shed light on the great dust storms that sweep across the planet, famously depicted in the 2015 science-fiction film "The Martian".

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Also called the "third zone" of the solar system, this large volume of space outside Neptune's orbit is home to thousands of icy, cold objects. This is where Pluto is also present.

In the cold, outermost area of our solar system lies one of the largest structures in our solar system. Also called the "third zone" of the solar system, this "donut-shaped" volume of space is called the Kuiper belt. This is where Pluto is also present.

The region encompasses hundreds of thousands of icy, cold objects and is outside Neptune's orbit.

The region is named so after astronomer Gerard Kuiper, who published a paper speculating objects beyond Pluto. This was also suggested by Astronomer Kenneth Edgeworth in the papers he published and sometimes this belt is called the Edgeworth-Kuiper Belt. Some researchers also refers to it as the Trans-Neptunian Region.

The icy bodies are called Kuiper Belt Objects (KBOS) or trans-Neptunian objects (TNOS). They are highly diverse in terms of size, shape, and colour. A significant number of KBOS have moons.

So how did the icy objects form? According to scientists, these icy objects are leftovers after the formation of our solar system. The region must have formed after these objects came together to form a planet but Neptune's gravity played spoilsport. The gravity shook up this region and these icy objects couldn't join to form a planet.

The Kuiper Belt volume is being lost nowadays. The amount of material which it carries now is much less when compared to what it contained earlier.

The objects in the belt collide and lead to fragmented, smaller objects. Sometimes the dust gets blown out of the solar system. We take a look at a few of the KBOS.

Haumea

This KBO is known for its strange shape and rotation style. According to NASA, the Haumea resembles a squashed American football. This was a result of the object's collision with another object half the size of it.

Eris

Smaller than Pluto, Eris takes 557 years to orbit the Sun. It has a moon called Dysnomia.

Arrokoth

Lying some billion miles past Pluto is the Arrokoth, a Kuiper Belt Object which means sky in the Native American language. This small snowman-shaped object is believed to hold clues about the origin of life on Earth and also about the planet's formation.

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A mission conceived as one for preventive maintenance turned out to be more urgent after four of the six gyroscopes on board the Hubble space telescope failed.

The Hubble space telescope has changed our understanding of the universe A telescope that was launched into low Earth orbit in 1990, Hubble still remains operational and continues to be a vital research tool. Following NASA's most recent review of Hubble's operations, it has been announced that NASA would support the observatory through June 2026, with estimates suggesting that it might be able to continue operations until the mid-2030s and even beyond.

Designed to be visited

While the longevity of the telescope is testament to the vision of those who conceived the mission, there's another crucial factor that has made it possible. Hubble was the first telescope that was designed to be visited in space. This meant that astronauts could not only perform repairs and replace parts, but also upgrade its tech with newer instruments. There have been five such missions that have taken place from 1993 to 2009. One such servicing mission in December 1999 turned out to be a life saver for the telescope.

After the first servicing mission in 1993 and the second one in 1997, the third to carry out preventive repairs was scheduled for June 2000. Since Servicing Mission 2 in February 1997, however, three of the six gyroscopes aboard Hubble had failed. With at least three working gyroscopes necessary for Hubble's operation, it prompted the managers to split Servicing Mission 3 (SM3) into two parts, SM3A and SM3B, with the former scheduled for December 1999.

An unexpected failure

 On November 13, 1999, a fourth gyroscope failed unexpectedly. With SM3A planned for the following month, this triggered NASA to place Hubble into safe mode. The safe mode was a sort of protective hibernation that prevented the telescope from making any observation. Hubble was in this state for over a month, waiting for the crew of SM3A to make their way.

With servicing mission veterans Steven Smith and Michael Foale at the helm, the seven-member crew aboard the Discovery Space Shuttle (STS-103) left for space on December 19. Within a couple of days, they manoeuvred close enough to Hubble such that it could be grappled with Discovery's robotic arm.

All six gyroscopes replaced

 The first of the three scheduled spacewalks took place over 8 hours and 15 minutes spanning December 22-23 (Central European Time, CET). Smith, along with fellow crew member John Grunsfeld, managed to replace all six of Hubble's gyroscopes. The entire astronomical community heaved a collective sigh of relief on receiving this news. The duo also replaced kits to prevent Hubble's batteries from overcharging.

While Hubble's main computer was changed in the second spacewalk that spanned 8 hours 10 minutes through December 23-24 (CET), the final spacewalk spanning 8 hours 8 minutes through December 24-25 (CET) saw a faulty transmitter and data tape recorder being replaced. Preliminary tests were then conducted to ensure that all of Hubble's systems, be it old or new, were performing satisfactorily.

Backs away slowly

Minutes into December 26 (CET), the Hubble telescope was released. Discovery then backed away from Hubble slowly. Having successfully performed the major objectives of the mission, the astronauts on board used the time remaining to stow away equipment, apart from making preparations for landing.

After orbiting the Earth 119 times and travelling more than 5 million km, Discovery made its way back. It performed a smooth night-time landing, touching down on the runway at the Kennedy Space Center in the U.S. on December 27. Hubble was successfully back in operation, and has been for over two decades since then.

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Dr. Abhijit Mukherjee, a professor of Geology from IIT- Kharagpur features among the top 100 influential people of 2020 by Time magazine. He is famous worldwide for his research in the field of groundwater exploration.

His team introduced a prediction model based on Artificial Intelligence for detecting arsenic in groundwater in the Gangetic delta. This feat was noted by the Jal Jeevan Mission.

A groundwater-surface water interaction is yet another one of his specializations. This work supplied important data regarding drinking water and food security to the Indian government. Dr. Abhijit Mukherjee has done ample researches on groundwater quantity and scarcity by understanding groundwater storage changes over the Indian subcontinent. This was achieved with advanced computation and Artificial Intelligence techniques.

Another significant role of Dr. Mukherjee is as head of one of South Asia's first Urban Geo-science projects in Varanasi. He has won the Shanti Swarup Bhatnagar Prize for 2020 in the field of Earth, Atmosphere, Ocean and Planetary Sciences.

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You might have read in the papers some time back that the Taj Mahal was losing its white marble sheen and turning yellowish due to pollution. Dr. Sachchida Nand Tripathi, who holds the Arjun Dev Joneja Faculty Chair of Civil Engineering at IIT-Kanpur, was in the news for this study. His study helped bring about policy changes in Agra city.

This study specified that black carbon and brown carbon from the burning of trash and fuels was the main cause for discolouration. Using a novel method, the team discovered how the specks of dust on the surface reflect light and affect the colour. This study is crucial to develop strategies that address yellowing of the Taj Mahal and improves air quality.

His work in the field of Atmospheric Sciences has addressed the issues of air pollution and climate change. He has also novel approaches for low-cost sensor-based network technology which can monitor air quality in cities and Real Time Source Apportionment (RTSA). RTSA involves finding out the sources of pollution and how much they affect the environment.

Dr. Tripathi is the Coordinator of the National Knowledge Network devised under the National Clean Air Program, and is a member of its Steering Committee and Monitoring Committee. Further, he is a member of the Executive Council, Climate Change Program, Department of Science and Technology.

The Shanti Swarup Bhatnagar Award and the J C Bose National Fellowship are both feathers in his cap. He is an elected Fellow of the Indian National Science Academy (INSA), Indian National Academy of Engineering (INAE) and National Academy of Sciences of India (NASI). He also worked at NASA’s Goddard Space Flight Centre as a senior fellow.

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Soumen Basak is an immunologist and virologist at the National Institute of Immunology (NII), New Delhi. He heads the Systems Immunology laboratory there.

He is known for his studies on NF- kappaB, a molecule that controls the activity of a gene.

Dr. Basak did his M.Sc. and PhD in Biochemistry from Calcutta University. He went on to the University of California, San Diego for post-doctoral studies.

He was awarded the National Bioscience Award for Career Development in 2018 and won the Shanti Swarup Bhatnagar Prize in biological sciences the next year.

Dr. Basak is a fellow of all three Indian Science Academies, namely the Indian National Science Academy, the Indian Academy of Sciences and the National Academy of Sciences.

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Have you ever noticed that all electric appliances generate heat energy? Do we need to waste electrical energy as heat? Kanishka Biswas, who is an associate professor in the New Chemistry Unit at Jawaharlal Nehru Centre for Advanced Scientific Research (JNCASR), Bangalore, and his team have come up with a novel compound called silver copper telluride(Ag Cu te) which converts waste heat into electricity. Usually, 65 per cent of electrical energy is wasted as heat energy. Silver copper telluride can be used in automobile industry and power plants where much of the energy is wasted as heat.

Kanishka Biswas is a Fellow of the Royal Society of Chemistry (FRSC), U.K. He has bagged many prestigious awards and prominent among them is the Shanti Swarup Bhatnagar Prize for Science and Technology, which he won for Chemical Sciences in 2021.

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