Ketchup was sold as medicine in the 1830s

Cruise ships have their own morgues.

Ladybugs 

defend themselves 

from predators by releasing a foul-smelling chemical from their knees.

Barcode readers only scan the white part and not the black.

There's a rare ant breed that can only be found in a 14-block section of Manhattan and nowhere else on the planet.

Sea otters hold hands while they sleep so they don't drift apart.

A grizzly bear's bite is strong enough to crush a bowling ball.