An ex-astronaut has revealed terrifying new details about a 'city-killing' asteroid that NASA fears ... This is simply how scientific data measurements play out,' he said. Hadfield would agree.

YR4 became the highest-rated asteroid predicted to strike Earth, and although predictions for impact have lowered, not enough ...

An asteroid that's big enough to wipe out a city has a 1-in-43 chance of hitting our planet in the year 2032. But according to new calculations, there's an even smaller chance that it might crash ...

Characterized as a potential "city-killer," the asteroid was first detected in December and its odds of impacting our planet have fluctuated since then, according to NASA and the European Space ...