According to Live Science, the lakes formed about 20,000 years ago because of a hotspot beneath the supercontinent of Pangaea that existed 300 million years ago. The supercontinent broke apart to ...

As an ice sheet thousands of feet thick began its final crawling retreat from North America to the Arctic toward the end of the last glacial period some 10,000 years ago, it left behind the planet’s ...

Dinosaurs are the extinct relatives of birds that roamed the lands and seas of ancient Earth. They first appeared around 240 ...

A day on Earth was just 23.5 hours long, 70 million years ago. Researchers discovered this by studying the growth rings of ancient mollusk fossils. The findings could tell us more about or planet ...

Deaths of nearby massive stars may have played a significant role in triggering at least two mass extinction events in ...

Few animal fossils have been found in the mine—chemicals in the ancient swamp's water may have dissolved shells and bones—but other sites from more than 300 million years ago, a period known ...