27th May 2016
Sharks are fish which have cartilages rather than bones. These fish evolved earlier than dinosaurs, which were reptiles. The fossil records show that sharks existed about 400 million years ago. Dinosaurs were found during the Triassic period, i.e. about 225 million years ago.
15th February 2016
Scientists believe that humans originated about 200,000 years ago in the Middle Paleolithic period in southern Africa. One of the oldest human settlements dating back to 160,000 years ago has been found at Middle Awash in Ethiopia. About 70,000 years ago, humans migrated out of Africa. They spread to Eurasia and Oceania 40,000 years ago, and reached the Americas 14,500 years ago.
