One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
402
A scorpion can hold its breath for up to 6 days.
19
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
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Denmark has twice as many pigs as there are people.
66