The most dangerous asteroids are the most difficult to detect.” Carnegie Science’s Scott S. Sheppard’s caution is no ...

On hearing the words "city killer" and "asteroid" in the same sentence, you'd be forgiven for thinking something bad is about to happen. But not to fear. Although an asteroid with the potential to ...

An asteroid about the size of a small building ... hazardous” to the planet if they are larger than 150m (500 ft) and projected to get closer than about 7.5 million km (4.65 million miles) to Earth.

A massive crater hidden beneath the Atlantic seafloor has been confirmed as the result of an asteroid strike from 66 million ...