Topics from December 2019 How can a boat sail into the wind? Posted by Keshav Jain on Friday, December 27. 2019 What is echo sounding? Posted by Keshav Jain on Friday, December 27. 2019 How are undersea telephone cables repaired? Posted by Keshav Jain on Thursday, December 26. 2019 How does an aqualung work? Posted by Keshav Jain on Thursday, December 26. 2019 What are the sea sunken secrets? Posted by Keshav Jain on Wednesday, December 25. 2019 How do pufferfish inflates? Posted by Keshav Jain on Tuesday, December 17. 2019 What are the facts about jellyfish? Posted by Keshav Jain on Monday, December 16. 2019 Which is the largest and smallest jellyfish? Posted by Keshav Jain on Monday, December 16. 2019