Iguanas have two penises!
55
Rats can't vomit, that's why rat poison works.
68
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
We share 70% of our DNA with a slug.
218
When a drone bee mates with a queen, its ejaculation is so powerful that it can even be heard by the human ear.
5
A koi fish, named "Hanako", was owned by several individuals over many years and lived to be 226 years old, dying in 1977.
6
The flea can jump 350 times its body length, that is like a human jumping the length of a football field.
32