In Australia, there are spiders big enough to eat snakes.
20
Penguins have a gland above their eye that turns saltwater into freshwater.
12
Sharks, like other fish, have their reproductive organs in their chests.
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The sound of a tiger's roar can travel a distance of up to 2 miles (~3 km).
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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
The Lion's Mane Jellyfish is the largest jellyfish in the world. They have been swimming in arctic waters since before the dinosaurs (over 650 million years ago).
12
A scorpion can hold its breath for up to 6 days.
19