Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
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
A hippo sleeping underwater automatically rises to the surface every ~4 minutes and breathes without waking.
23
Cats and dogs can hear ultrasound.
350
A domestic cat can sprint at about 31 miles per hour.
274
Vanilla flavoring is sometimes made with an ingredient from beaver pee.
82