One reason that kittens sleep so much is because a growth hormone is released only during sleep.
212
Dolphins have names for one another.
18
Vampire bats adopt orphans, and are one of the few mammals known to risk their own lives to share food with less fortunate roost-mates.
402
Mosquitoes prefer certain blood types, and people with the “O” blood type are more likely to get bitten.
12
Whales and dolphins can't taste anything other than salt.
11
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
The Platypus used to be considered a myth like Bigfoot and the Yeti.
18
George was the world's largest dog who weighed 233 pounds, stood at 43 inches tall from paw to shoulder, and ate 180 pounds of food a month.
7