The team found that the emergence of many sea creatures during the Cambrian explosion could be explained by an accelerated — but not unrealistic — evolution by way of natural selection, or the ...

Twenty million years after the Cambrian explosion, something lethal wiped out almost half of all sea life in the world. For years, it was believed that the mass death event was caused by low ...

The team found that the emergence of many sea creatures during the Cambrian explosion could be explained by an accelerated — but not unrealistic — evolution by way of natural selection, or the ...

Past research showed they dominated the seas during the early and middle Cambrian period 542 million to 501 million years ago, a span of time known for the "Cambrian Explosion" that saw the ...

A 500-million-year-old sea squirt is the evolutionary clue we need to understand our humble beginnings With no teeth, bones, or shell, this ‘watery sack’ is a rare fossil find that tells us a ...

Paleozoic Era (541 - 252 million years ago) Cambrian Period (541 - 485 million years ago): Cambrian Explosion; rapid diversification of life, including the first hard-bodied organisms.

In places where sea-floor oxygen levels are a bit higher — about 0.5–3% of concentrations at the sea surface — animals are more abundant but their food webs remain limited: the animals still ...

The Cambrian explosion was an extraordinary phenomenon in the evolution of life on the planet that led to the emergence of many animal phyla and the diversification of species. During this period ...

Cambrian Period & Cambrian Explosion: Facts & Information These Bizarre Sea Monsters Once Ruled the Ocean Photos: 508-Million-Year-Old Bristly Worm Looked Like a Kitchen Brush ...

A spectacularly well-preserved sea monster that once prowled the oceans during the Cambrian Period has been unearthed in China. The 520-million-year-old creature, one of the first predators of its ...