Topics from October 2020 How is a fossil made? Posted by Keshav Jain on Wednesday, October 7. 2020 When did modern humans appear? Posted by Keshav Jain on Wednesday, October 7. 2020 Who were the very first humans? Posted by Keshav Jain on Wednesday, October 7. 2020 What are mammals? Posted by Keshav Jain on Tuesday, October 6. 2020 What are birds? Posted by Keshav Jain on Tuesday, October 6. 2020 What are reptiles? Posted by Keshav Jain on Tuesday, October 6. 2020 When and where did life on Earth begin? Posted by Keshav Jain on Tuesday, October 6. 2020 When did life first appear on land? Posted by Keshav Jain on Tuesday, October 6. 2020 How old is the Earth? Posted by Keshav Jain on Tuesday, October 6. 2020