Captive pandas were observed acting strangely before Monday's devastating quake, mirroring previous accounts of animals reacting before disaster strikes.
Watch young chimpanzees beat Japanese college students in a short-term-memory test by a wide margin—raising questions about primate intelligence and evolution.
Jaw and facial structures in the ancient human relatives show that they could open unusually wide, although researchers are stumped as to why they had this ability.
The giant defrosted this week has the world's biggest eyes, as well as light-emitting organs that may help render the squid invisible to predators, scientists say.
A colossal squid caught last year—thought to be the largest ever recorded—is giving scientists their first close look at the rare and elusive giant.