One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
There was a bear called Wojtek who was adopted by Polish soldiers during WW2. It carried ammunition, wrestled with soldiers, and drank beer.
40
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
Condoms were originally made of animal intestines or linen.
347
A cow produces around 200,000 glasses of milk in her lifetime.
373