The elephant brain weighs about 6,000g.
274
Cats sleep for 70% of their lives.
8
Allegedly, Chrysippus, the Greek philosopher, died of laughter after getting his donkey drunk and watching it try to eat figs.
47
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
Nervous dogs wag their tails to the left, and happy dogs to the right (from the dog’s point of view) – and fellow canines pick up on this lop-sided tail language.
10
Denmark has twice as many pigs as there are people.
66