I was reading about strange facts about animals and here are some facts that i came across. crocodiles are not able to stick out their tongues. Hedgehog's heartbeats beat over 300 times per min. A snail can sleep for 3 years. cats pee glows under a black light. camels have three eyelids to protect their eyes from blowing sand. The longest flight record for a chicken is 13 seconds. elephants are the only animal that can't jump. Porcupines float in water. An ostrich's eye is bigger than its brain. Slugs have four noses. Robins eat 3 miles a earthworms a year. Worms have ten hearts. Goldfish have a memory span of three seconds. Snakes can see through their eyelids. Kangaroos cannot walk backwards. A cat has 32 muscles in each ear. A woodpecker can peck a piece of wood 20 times per second. Tigers have striped skin, not striped fur. The praying mantis is the only animal that can turn its head 360 degrees. Hamsters blink with one eye at a time. A full grown bear can run as fast as a horse.