An alligator can go through 2,000 to 3,000 teeth in a lifetime.
268
A dork is a whale's penis.
327
Cats and dogs can hear ultrasound.
350
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 group of pugs is called a grumble.
10
Cats recognise the voice of their owner, but never evolved to care.
22
Some lizards, in which the tail is a major storage organ for accumulating reserves, will return to a dropped tail after the threat has passed, and will eat it to recover part of the sacrificed supplies.
13