YR4 has a 2% chance of hitting Earth in 2032. Astronomers are tracking it to refine estimates of its size and orbit to see how much of a risk the space rock poses.

The head of planetary defense at the European Space Agency discusses 2024 YR4, an asteroid with a small chance of striking ...

A supposed square structure spotted on Mars sparked speculation about alien archeological sites on the red planet. It's a fun ...

Even the smallest odds of an impact sound alarming, but scientists’ ability to calculate them is actually good news.

A square-shaped formation on Mars, about 3 kilometers wide, has generated interest and speculation. NASA's Mars Global ...

A Mars image shows a strange square formation. Some think it's artificial, but experts suggest natural causes.

In New York's Times Square, couples braved the cold to get married on Valentine's Day. Mars Carbonell said he and his wife ...

A U.S. scientist searching for a civilization across 7 Earth clones circling the red dwarf star TRAPPIST-1 says its own alien astronomers could also be scanning Earth.

A newly discovered asteroid named 2024 YR4 now has a 2.2% chance of affecting Earth in 2032 after recent observations.

This 2023 satellite photo shows the heart-shaped Spirit Lake, which was transformed by the cataclysmic eruption of Mount St.

Scientists say the threat of a newly discovered asteroid has risen slightly in the past few weeks as the world's telescopes ...