More space technology must be developed to prevent "city-killing asteroids" from hitting Earth, experts recommended at a recent science conference. While the risk is low, mid-size asteroids near Earth ...

Asteroids hitting Earth sounds like a story straight out of science fiction, or the era of dinosaurs. But the threat is very real. Every year, dozens of asteroids fly by Earth at various distances.

Here’s one less thing to worry about: Scientists have confirmed that NASA is even better than it thought at protecting us from asteroids. Despite doomsday movie plots about Earth-ending collisions, a ...