As astronomers track down more clues as to the existence of a large world orbiting the sun in the outer fringes of the solar system, a classic planetary purveyor of doom has been resurrected.
A 250-million-year-old skull found in southern Brazil is helping researchers increase their understanding of life before dinosaurs appeared on the scene.
As human civilization drives more animals to extinction, extreme sizes will likely become the new norm.
We have the whole dinosaur extinction thing figured out, right? A big rock smashed into Earth and wiped them all out. But an NYU geophysicist wonders what sent the rock Earth's way in the first place and pins the deadly event on a novel culprit.
Dominant species spread across the globe are just as vulnerable during a mass extinction event as more fragile ones confined to a single locale.
A quick warming of the Earth about 60,000 to 12,000 years ago drove large animals like the wooly mammoth into extinction, says a new study.
The sixth mass extinction on Earth is upon us, confirms an extensive new study. Here are just a handful of its victims.
The meteorite that killed off the dinosaurs 66 million years took a toll on evergreen trees.
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