Jellyfish as a species are actually older than dinosaurs and sharks.
383
Squirrels will sometimes adopt orphaned baby squirrels that they’re related to.
12
When a male honey bee climaxes during sex, his testicles explode and then he dies.
27
It has been estimated that a bite from a grizzly bear can crush a bowling ball.
11
The Pistol Shrimp can snap its claws together to create a sound of 218 decibels, louder than as supersonic jet at full speed. It only lasts for 1 millisecond. The snapping action also creates a bubble that is greater than 5000 Kelvin, close to the surface temperature of the sun.
21
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
Condoms were originally made of animal intestines or linen.
347