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.

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

The stuff that can ruin your day from space isn’t “everything out there”—it’s a specific club: Near-Earth Objects that can cross our orbit. Most asteroids live safely in the main belt, but some get ...

Estimating a mass for a potentially hazardous asteroid (PHA) is perhaps the single most important thing to understand about ...

Add Yahoo as a preferred source to see more of our stories on Google. When you buy through links on our articles, Future and its syndication partners may earn a commission. It's a cosmic roll of the ...

NASA scientists recently expressed alarm over the potential threat posed by approximately 15,000 undetected asteroids capable of causing significant regional destruction. Currently, only 40 per cent ...

Earth faces a significant threat from thousands of undetected asteroids capable of destroying cities. NASA's planetary defence chief warns that current systems cannot reliably stop these 'city-killers ...

A NASA planetary expert has revealed that humankind has no way to protect against a city-killer asteroid if it were to head ...

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

Scientists estimate that around 15,000 medium-sized asteroids — large enough to devastate a city — remain undetected within ...

The dinosaurs were wiped out by an asteroid, but does that mean we risk suffering the same fate - and should you be worried about the possibility? Leah Crane sets the matter straight ...