To walk on walls and ceilings, your feet have to stick, but they have to get unstuck, too.
Caves are among the predators’ favorite spots.
The brain doesn't much care whether an experience is real.
Humans will never win a sprint against your average quadruped. But our species is well-adapted for the marathon.
Hear author Xiaoming Wang interviewed by Vittorio Maestro, Editor in Chief of Natural History. (MP3, 17 minutes)