Scientists trying to work out whether a star exploded and the resulting debris crashed into Earth 10 million years ago may be one step closer to solving the mystery. They discovered an unusual amount ...

NASA’s IMAP mission will explore the heliosphere and study how it shields Earth from cosmic radiation and space weather.

From a distance, Biosphere 2 emerges from the cacti and creosote of the Sonoran desert like a gleaming oasis, a colony of ...

What looked like a small hole in the ground turned out to be a 220-foot vertical drop straight into the Earth. We couldn’t believe how deep it went - or how hidden it was. In this episode, we ...