This is an archived article and the information in the article may be outdated. Please look at the time stamp on the story to see when it was last updated. ST. LOUIS (KTVI) – A comet spanning roughly ...

Could humanity nuke an incoming asteroid to deflect it and save the Earth, disaster-movie style? A unique new impact simulation suggests that a nuclear option could be a viable last resort to avert an ...

ST. LOUIS (KTVI) – A comet spanning roughly 2,000 feet landing in the heart of St. Louis could cause a crater nearly 4 miles wide and an earthquake felt as far as 116 miles away, according to an ...

Planetary defense has moved from science fiction to a live engineering problem, and the stakes could not be higher. The central question is no longer whether an asteroid will eventually head our way, ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. NASA estimates that ...