Dogs sometimes fake being sick to get attention.
26
Mosquitoes don't just bite you, they also pee on you.
11
Cymothoa exigua is a type of parasite that enters through fish's gills, eats their tongue, and then replaces it.
6
Tigers can see 6 times better at night than humans.
305
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
Condoms were originally made of animal intestines or linen.
347
Worker bees must visit around 4,000 flowers in order to make one tablespoon of honey.
5