This surprising hypothesis, published in Earth and Planetary Science Letters, stems from plate tectonic reconstructions for the Ordovician period noting the positions of 21 asteroid impact craters.

Scientists observed that all examined craters are situated within 30 degrees of the equator. This concentrated impact area, ...

3 min read During the Ordovician period ... For the most part the Earth's climate was warm and wet, with sea levels rising as much as 1,970 feet (600 meters) above those of today.

Uncover the golden fossil of Lomankus edgecombei, a 450-million-year-old arthropod, offering rare insights into ancient ...

A new study suggests that extreme temperatures could lead to a mass extinction event, ending the reign of humans and mammals ...

Back when the Earth was crawling with trilobites and other strange shelled creatures, our planet may have had a ring just like Saturn's. This ancient ring system is thought to have formed about ...

During the time 485 to 443 million years ago, known as the Ordovician period, Earth was already in the throes of a serious cold snap. But the ring may have exacerbated things, plunging the planet ...

A recent study claims that Earth may have once had a ring system. This theory sheds light on the presence of an unusual density of impact craters around the equator dating back to the ...

Scientists use the evidence recorded within rocks throughout geologic time to reconstruct a picture of earth's history. Amateurs, too, can look at local rocks to learn about what life was like in the ...

It’s possible that the Ordovician craters in Earth’s rock record were created by another astronomical phenomenon, like asteroid debris forming a miniature moon that then broke apart.

A new 450-million-year-old fossil arthropod, preserved in 3D by iron pyrite (fool’s gold), has been unveiled by scientists.