Dolphins have names for one another.
18
Parrot parents "name" their children with a signature call.
112
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
Cats recognise the voice of their owner, but never evolved to care.
22
A scorpion can hold its breath for up to 6 days.
19