Early American humans hunted car-size armadillos and used their shells for houses.
12
Mosquitoes don't just bite you, they also pee on you.
11
The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
255
The Platypus used to be considered a myth like Bigfoot and the Yeti.
18
Cats and dogs can hear ultrasound.
350
Dogs sometimes fake being sick to get attention.
26
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
A dog's naked behind leaves absolutely no bacteria when pressed against carpet.
250