See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Why did some of Earth's earliest complex organisms start to grow larger ...

Scientists discovered exceptionally preserved Ediacaran fossils in sandstone. (Image: Geology) Scientists solved how Ediacaran soft-bodied fossils survived in sandstone. Ancient seawater chemistry and ...

In a Cambrian seascape, animals with complex bodies begin to take shape, leaving behind the first imprint of modern life. This moment, around 535 million years ago, marked the apparent beginning of ...

Goblet-shaped sea jelly relatives with miniature “arms.” A plump, legless creature resembling a sausage. Long, wormlike animals tipped with flat “holdfast” discs for anchoring to the seafloor.