The idea of an asteroid hitting Earth can be a scary one, but it can be pretty hard to comprehend just how scary such an impact might potentially be. To put things in context, many people who have ...

Sixty-six million years ago, this asteroid crashed into Earth and wiped out most of the life on our planet. Including the ...

The asteroid, around 100 feet in diameter, is speeding toward our planet at about 22,000 miles per hour, according to NASA.

THIS IS A RUSH TRANSCRIPT. THIS COPY MAY NOT BE IN ITS FINAL FORM AND MAY BE UPDATED. COLLEEN MCEDWARDS, CNN ANCHOR: You've probably heard that an asteroid hit the Earth 65 million years ago. I think ...