In a stark and widely reported warning, NASA’s planetary defence chief has revealed that Earth currently has no reliable way to stop thousands of “cit.

NASA officials warn thousands of undetected “city killer” asteroids may be circling near Earth. With limited deflection tools ready, are we prepared if one suddenly shifts onto a collision course?

ISS BioAsteroid study shows bacteria and fungi can extract metals from meteorite material in microgravity, offering insights for future space resource use ...

China's Tianwen-2 spacecraft captured a selfie with Earth when it was about 26.7 million miles (44M km) from Earth and 28 million mi. (45M km) from asteroid 2016HO3. Credit: Space.com | footage courte ...

If the world exploded, what proportion of the rocks floating in space would have evidence of life? (continued) ...

NASA's top planetary defense expert reveals the biggest threat isn't Hollywood-style doomsday rocks, but undiscovered 'city-killer' asteroids. While large and small threats are known, an estimated 25, ...

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

NASA experts warned that human beings are vulnerable to thousands of hidden “city-killer” asteroids. A new space telescope may improve detection, but we currently lack tools to stop a threat., US Buzz ...

While not an official term, "city-killing asteroids" refers to asteroids large enough to significantly damage cities if they ...

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

"We would not have any way to go and actively deflect one right now," warns the scientist who led NASA's DART mission.

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 ...