Scientists believe that the event leading to the extinction may have been a massive asteroid impact or huge volcanic activity. Events such as these could have blocked out sunlight and significantly changed the Earth's ecology.

A mole can dig a tunnel three hundred feet long in a single night.

In 1982, a cactus in Phoenix, Arizona killed a man. David Grundman fired two shotgun blasts at a giant saguaro cactus that ended up falling on top of him.

AMAZING FACTS