Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
Denmark has twice as many pigs as there are people.
66
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
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
One in three dog owners say they have talked to their pets on the phone.
427
During World War 1, starving wolves amassed in such great numbers that Germans and Russians had a temporary cease fire to fight off the wolf attacks.
45
A group of pugs is called a grumble.
10
Sheep, goats, octopuses, and toads have rectangular pupils.
7