Denmark has twice as many pigs as there are people.
66
By putting a frog in a bucket of milk, scientists following up on an ancient Russian way of keeping milk from going sour have identified a wealth of new antibiotic substances.
9
A cat rubs against people not only to be affectionate but also to mark out its territory with scent glands around its face. The tail area and paws also carry the cat's scent.
293
Dolphins can rapidly heal from extreme injuries, such as shark bites, and regenerate their original body shape.
19
The first known contraceptive was crocodile dung, used by Egyptians in 2000 B.C.
79
Jellyfish as a species are actually older than dinosaurs and sharks.
383