Specifically, the findings support the hypothesis that supernovae could have triggered two of the so-called "big five" mass ...

Learn more about the time period that took place 488 to 443 million years ago. 3 min read During the Ordovician period, part of the Paleozoic era, a rich variety of marine life flourished in the ...

But first there was a period of biological regrouping following the disastrous climax to the Ordovician. The recovery soon got under way in the oceans as climbing temperatures and rising sea ...

“Shark-like scales from the Late Ordovician have been found ... including many lineages of fish that once swam the oceans. This allowed sharks to dominate, giving rise to a whole variety of shapes and ...

“With this work, we’ll be able to examine the chemistry of early oceans and reinterpret parts ... rocks from the Ediacaran ...