Denmark has twice as many pigs as there are people.
66
Dolphins sometimes have fun by blowing bubbles and creating rings of air underwater, which they then swim through.
17
Cats and dogs can hear ultrasound.
350
The Platypus used to be considered a myth like Bigfoot and the Yeti.
18
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
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