But around 635 million years ago, that began to change. The first large, multi-celled organisms appeared, like cnidarians (including corals and jellies) and sponges. Then, about 540 million years ...

which date to about 500 million years ago. Now, in a study published today (July 28) in Nature, Elizabeth Turner, a geologist at Laurentian University in Canada, identified structures in ...

Animals living about 500 million years ago spent time on mudflats that were periodically exposed to the air. The finding suggests that some of the earliest animals were able to survive outside of ...

FROM 508 MILLION YEARS AGO TO TODAYPreserved in the Burgess Shale ... relative speaks to a lifestyle that hasn’t changed much in 500 million years. Photographed at the Elizabeth Moore ...

It belongs to a family that has barely changed since appearing in the fossil records around 500 million years ago, leading scientists to describe it as a “living fossil.” Its fractal shell designs are ...