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 ...

Ever since their discovery in 1909, the spectacular Burgess Shale outcrops in the Canadian Rockies have presented scientists with a cornucopia of evidence for the “explosion” of complex ...

The jawless ostracoderms were still the most common swimmers in the sea, and they developed all sorts of spines and horns, likely to protect themselves from carnivorous sea scorpions, the Eurypterids.

A fossil of a 520-million-year-old sea creature with ... Cambrian explosion. ... while others thought the animals were part of a group called chelicerates that includes spiders and scorpions.

“The Cambrian explosion was a period of time 450 million years ago where arthropods evolved and there was this really cool radiation of life ... a sea scorpion that evolved into modern ...

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 ...

Bizarre shrimp-like monsters that were the world's largest predators for millions of years grew even larger and survived much longer than thought, scientists find.

A 508-million-year-old sea predator with a 'jackknife' head Oldest close parent of spiders, scorpions and horseshoe crabs evolved sophisticated head to hunt and eat small shelly animals ...

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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 ...

During the Cambrian Explosion more than 500 million years ... This was a dynamic era when holdovers from the Cambrian rubbed shoulders with evolutionary newcomers like sea scorpions and horseshoe ...