Every new extinction ripples out beyond the affected species, from ecosystems to human knowledge across culture, spirituality ...

New research finds extinction rates have been declining for a century, challenging assumptions of an ongoing mass extinction.

The first thing to know about a new comet that has appeared in the evening sky is that it's one big ice ball: about 5 kilometers (3.1 miles) across. "Just to put it into context, about 65 million ...

Researchers from the Center for Astrophysics theorize that a comet, not an asteroid, is to blame for killing off the dinosaurs on Earth. In a press release, researchers said the Chicxulub impactor ...

Breakthrough Listen searched for technosignatures from interstellar comet 3I/ATLAS but found no unusual signals or behavior ...

Human activity may be triggering the greatest extinction event since the asteroid impact that wiped out the dinosaurs, according to scientists. Their study, based on a review of decades of research on ...