Denmark has twice as many pigs as there are people.
66
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
If a vampire bat goes 2 days without drinking blood, they can die. However, well fed female bats will puke up blood and share it with other bats that they like in exchange for grooming.
13
A domestic cat can sprint at about 31 miles per hour.
274
The most expensive dog in the world is the Tibetan Mastiff; worth $1.5 million.
2
Sheep, goats, octopuses, and toads have rectangular pupils.
7
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