The Paleozoic Era, which ran from 541 million to 251.9 ... Coral reefs flourished, providing shelter for fish and shelled creatures, such as nautiloids and ammonoids. Modern conifers and ginkgo ...

These spiral-shelled creatures have hardly changed since they first appeared over 500 million years ago during the early Paleozoic era (541 to 252 million years ago). Found in the Western Pacific ...

3 min read The Cambrian period, part of the Paleozoic era, produced the most intense ... These toughened-up creatures represented a crucial innovation: hard bodies offering animals both a defense ...

The Paleozoic era's Silurian period saw animals and plants ... organisms was stoked by oceans teeming with tiny planktonic creatures. Waiting at the other end of the food chain were the fearsome ...

The best time to see the ancient wonders that are horseshoe crabs is now, as they return to Delaware Bay beaches for spawning ...

This Age of Reptiles was a spectacular prehistoric epic, and it all took place in a single era: the Mesozoic. Reptiles emerged from the Paleozoic as humble creatures, but in time, they grew to ...

Little is known about Paleozoic creatures’ parental prowess. But a newly uncovered 300-million-year-old fossil might be the earliest evidence of a parent, well, acting like a parent. Researchers ...

Researchers reconstruct biodiversity changes during the early Paleozoic Era. Marine biodiversity underwent large and abrupt changes during the early Paleozoic Era. However, the temporal resolution ...

The end-Paleozoic witnessed the most devastating mass extinction in Earth's history so far, killing the majority of species and profoundly shaping the evolutionary history of the survivors.