Mosquitoes don't just bite you, they also pee on you.
11
Cats and dogs can hear ultrasound.
350
When cats are happy, they may squeeze their eyes shut.
10
A newborn Chinese water deer is so small, it can (almost) be held in the palm of a hand.
13
The CIA once spent $20 million on a cat equipped with gear to spy on the Soviets, but it was hit by a taxi.
328
Penguins have a gland above their eye that turns saltwater into freshwater.
12