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
Sharks have been on the planet longer than trees.
14
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
The oldest creature ever found was Ming the clam at an admirable 507 years old.
16
The station master and operating officer at the Kishi Station, Japan, is a cat!
18