Cats are one of the only animals to domesticate themselves and approach humans on their own terms.
20
Shark corneas are used in eye transplants and shark bone marrow can be used to graft human bones.
132
The Pistol Shrimp can snap its claws together to create a sound of 218 decibels, louder than as supersonic jet at full speed. It only lasts for 1 millisecond. The snapping action also creates a bubble that is greater than 5000 Kelvin, close to the surface temperature of the sun.
21
Meysi is one of the world's smallest dogs, measuring in at just 7cm tall, 12cm long, and weighing a meagre 250 grams (only slightly heavier than a hamster!)
11
When Washoe, the first chimp to use sign language, was told that her caretaker's baby had died, she signed "CRY."
20
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
On some poorly researched trivia lists it is stated as a fact that a pregnant goldfish is called a twit. This is not true as goldfish lay eggs.
71
If a vampire bat goes 2 days without drinking blood, they can die. However, well fed female bats will puke up blood and share it with other bats that they like in exchange for grooming.
13