Christmas Island has bridges for crabs to stop them getting run over during the mass migration.
9
Sloths take two weeks to digest their food.
243
Travis was a chimpanzee who socialized with humans since birth. He could log onto a computer to look at pictures, watch TV using a remote control, brush his teeth, feed hay to his owner's horses, water plants, and learned the schedule of passing ice cream trucks.
11
Whales and dolphins can't taste anything other than salt.
11
Leonardo Da Vinci loved animals so much that he used to buy caged animals at the market just to set them free.
57
Tigers can see 6 times better at night than humans.
305
Sergeant Stubby was the only war dog to be promoted to sergeant through combat in WWI. He saved his regiment from surprise mustard gas attacks, found and comforted the wounded, and even once caught a German spy by the seat of his pants, holding him there until American Soldiers found him.
16