What If is a Webby Award-winning science web series that takes you on a journey through hypothetical worlds and possibilities, some in distant corners of the universe, others right here on Earth.

An impact from Bennu would be very destructive, but Earth has seen worse. Around 66 million years ago, an asteroid that was roughly 6 miles wide (10 kilometers across) struck Earth, killing most ...

Objects around 150 feet wide have hit Earth before. If Asteroid 2024 YR4 hit the planet it would be a regional impact event, not impacting the whole planet. People, even a hundred miles away ...

An asteroid measuring as wide as 295 feet is possibly headed right toward Earth, but don’t run for cover just yet. A NASA-funded telescope in Rio Hurtado, Chile, first spotted the asteroid ...

An asteroid nearly the size of a football field now has roughly a 0.004% chance of hitting Earth in about eight years, NASA says — with the space agency saying it "no longer poses a significant ...

Will 2024 YR4 hit Earth? As of February 2025, NASA's analysis indicates that asteroid 2024 YR4 has a 2.3% chance of hitting Earth on Dec. 22, 2032. This means there is a 97.7% probability that it ...

Astronomers are tracking an asteroid that could hit Earth in 2032 (Audio) 4:16. This photo provided by NASA shows the Orionid meteors on Oct. 13, 2015.

First spotted last month by a telescope in Chile, a near-Earth asteroid — designated 2024 YR4 — is estimated to be 130 to 330 feet across.

If you were to look up from Earth some 466 million years ago, ... “I got the idea when I read a popular science article about Phobos and Deimos, the moons around Mars, ...