"We don’t know where they are,” said NASA’s planetary defense officer Kelly Fast at the AAAS conference in Arizona this week.

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

Imagine a rock the size of a football stadium hurtling through space at thousands of miles per hour, heading straight for a major city, and we have no way to stop it. NASA has just issued a sobering ...

NASA boffins have warned that Earth has no protection against the possibility of being struck by "city killer" asteroids that are hurtling through space.

A solar storm is a catchall term that describes any disturbance in the sun that involves the violent ejection of solar ...

The Earth's magnetic field and oxygen evolved together over 540 million years, according to a major NASA study.

NASA experts warned that human beings are vulnerable to thousands of hidden “city-killer” asteroids. A new space telescope ...

A NASA scientist has warned that thousands of city-killing asteroids could strike Earth, and there’s currently no defense ...

Inside NASA’s Arc Jet Complex at the Ames Research Centre in California, a heat shield design is being put to the test ...

Scientists discussed the threat of asteroids at a recent conference in Phoenix. Here's what they said.

NASA's head of planetary defence, Dr Kelly Fast, has issued an unsettling update on thousands of ‘city-killer’ asteroids that could hit Earth.

NASA’s breathtaking space photo reveals the hidden beauty of Zimbabwe’s Great Dyke, a 2.5-billion-year-old geological structure.