Why did our ancestors ditch the shell and start growing babies inside their bodies instead? In this episode of Big Ideas, ...

Where are all the baby blue whales? Scientists may have finally cracked the mystery - Blue whale calves are rarely seen with ...

Platypuses are weird looking. They look like someone stitched together a duck and a beaver—flat bill, webbed feet, and a ...

An echidna in Australia is digging into a termite mound for food. Echidnas are rare mammals that lay eggs instead of giving ...