One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
When a male gentoo penguin "falls in love" with a female penguin, he searches the entire beach to find the perfect pebble to present to her.
25
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Jaguars frequently get high by eating hallucinogenic roots, which also increases their senses for hunting.
6
A dork is a whale's penis.
327