A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
Cats recognise the voice of their owner, but never evolved to care.
22
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
Female kangaroos have three vaginas.
2
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
Condoms were originally made of animal intestines or linen.
347
In 1955, the citizens of São Paulo were so upset with their government that they elected a rhinoceros named Cacareco (meaning rubbish) to the city council in protest, with over 100,000 votes.
18