New simulations suggest comets couldn’t have kick-started life on their own, though they may still have played a smaller role.

The study challenges a century-old theory that the celestial bodies delivered the molecular “building blocks” for life on the ...

Note: On February 11, 2026, the article by Christopher R. Moore et al., "A 12,800-year-old layer with cometary dust, microspherules, and platinum anomaly recorded in multiple cores from Baffin Bay," ...

A sharp cold spell began about 12,900 years ago, with a platinum spike in Greenland ice at its start: Established A comet impact or airburst caused the cold sp ...

Learn about the comet impact hypothesis that may explain why North America lost most of its megafauna along with the Clovis culture around 13,000 years ago. Editor's note: The paper referenced in this ...

Twenty-five years ago, humanity first witnessed a collision between a comet and a planet. From July 16 to 22, 1994, enormous pieces of the comet Shoemaker-Levy 9 (SL9), discovered just a year prior, ...

Comets that have hit Earth have been a mixed bag. Early in Earth's history, during the solar system's chaotic beginning, they were likely the source of our planet's water, ultimately making up about 0 ...

For the first time, scientists have processed images from NASA’s Deep Impact spacecraft and clearly seen the solid body, or nucleus, of the comet through the vast cloud of dust and gas that surrounds ...

Analysis of ocean sediments has surfaced geochemical clues in line with the possibility that an encounter with a disintegrating comet 12,800 years ago in the Northern Hemisphere triggered rapid ...