asteroid, but refuted a 2021 hypothesis that the dinosaur killer was likely a comet. "Comets come from very far from the sun, but they're mostly made out of ice and dust," Tissot said.

The dino killer was a rare clay-rich mudball ... chondrite signatures,” Goderis said. Therefore, the asteroid that killed the dinosaurs was probably a carbonaceous chondrite, an ancient space ...

Earth’s most famous killer asteroid came from the outer reaches ... volcanic eruptions that have also been implicated in the dinosaurs’ demise (SN: 9/28/23). Most meteorites found on Earth ...

An illustration of a large asteroid colliding with Earth on the Yucatan Peninsula in what is modern-day Mexico. 34,906 people played the daily Crossword recently. Can you solve it faster than others?

The asteroid ... "dinosaur-killing" impact from a rock perhaps a half-mile across or larger happens on 100-million-year timescales. Astronomers have already found over 90 percent of the "planet ...

An asteroid nearly the size ... wiping out the dinosaurs and 75% of all species. By contrast, 2024 YR4 falls into the "city killer" category. "If you put it over Paris or London or New York ...