Throughout Earth's history, the planet has been struck by multiple asteroids, some so large, like the Chicxulub Impactor, that Earth's climate was altered to the point of a mass extinction event.

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

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

In 2023, NASA’s OSIRIS-REx spacecraft collected samples of 4.6-billion-year-old rocks from an asteroid called Bennu and brought them back to Earth. They found amino acids, the building blocks of ...

Add Yahoo as a preferred source to see more of our stories on Google. Scientists studying Chang’e-6 Moon samples discovered rare water-rich meteorite fragments, offering new clues about how water ...

SwRI scientists reviewed spectral data of sample material taken from near-Earth asteroids Ryugu and Bennu (pictured above) and compared them with spectral data of main belt asteroid Polana from the ...

A NASA planetary defense officer warns thousands of near-Earth asteroids capable of destroying a city remain undetected.

The moon is pummeled by asteroids nearly every day, creating new craters constantly that can range from a few feet to many miles across. The asteroid impacts, when they’re large enough, create flashes ...

Grab-and-go missions to asteroids have provided some of the most scientifically valuable samples since the Apollo missions—and they’re shaking up the search for life beyond Earth. The OSIRIS-REx ...

Space around the Sun contains far more than planets. Scattered through it are smaller bodies made of rock, metal, ice and dust. These objects move on .