Mammals
The warm-blooded branch: from a bumblebee-sized bat to the blue whale.
The first mammals have arrived; the full branch is growing.
Meet the stars
- ★ Blue WhaleWhen the Ocean Sang BackThe blue whale, the largest animal that has ever lived, sings a call so deep and powerful it can travel hundreds of kilometers through the sea.3 min story
- ★ PlatypusHow to Be ImpossibleThe platypus seemed so impossible in 1799 that scientists searched its skin for stitches, yet it truly lays eggs and hunts by sensing electricity.3 min story