New evidence suggests that a comet explosion over North America may have triggered a massive wave of destruction nearly ...

Almost 13,000 years ago, North America underwent drastic changes at a rapid rate. Mammoths, mastodons, giant ground sloths, ...

The new paper argues that, in SN 1181, the first phase of the supernova fizzled out and left behind an unusually active ...

NASA has released its longest-ever time-lapse from the Chandra X-ray Observatory, capturing the expanding remains of Keplers ...

Scientists are uncovering new clues that a cosmic explosion may have rocked Earth at the end of the last ice age. At major ...

Scientists have detected the most distant supernova ever seen, exploding when the universe was less than a billion years old.

A nuclear winter is a theoretical concept, but if the climate scenario expected to follow a large-scale nuclear war, in which smoke and soot from firestorms block sunlight, came to fruition, global ...