Scientists are raising serious alarms about hidden threats from space that could strike Earth without warning. NASA officials ...

NASA experts are raising alarms about the growing threat posed bynear-Earth asteroids, with some of these objects having the ...

"We don’t know where they are,” said NASA’s planetary defense officer Kelly Fast at the AAAS conference in Arizona this week.

A NASA planetary defense officer warns thousands of near-Earth asteroids capable of destroying a city remain undetected.

She’s worried about the a-rock-alypse. A planetary defense expert is warning that humanity is defenseless against up to 15,000 undetected near-Earth asteroids that have the potential to take out a ...

NASA planetary defense experts warn that up to 15,000 undetected asteroids could devastate a major city on Earth.

NASA's head of planetary defence, Dr Kelly Fast, has issued an unsettling update on thousands of ‘city-killer’ asteroids that could hit Earth.

NASA has raised red flags over growing asteroid threats that could potentially damage the Earth.To one’s surprise, astronomers are unaware of the location of thousands ...

Imagine a rock the size of a football stadium hurtling through space at thousands of miles per hour, heading straight for a major city, and we have no way to stop it. NASA has just issued a sobering ...

A 170-foot asteroid is set to race past Earth today at extraordinary speed, NASA says. Though no impact is expected, ...

Space agencies maintain that global cooperation and sustained investment are vital to planetary defence. While the DART ...

Add Yahoo as a preferred source to see more of our stories on Google. Nasa said that around 15,000 mid-sized asteroids are unaccounted for - Maciej Frolow Astronomers do not know where thousands of ...