WASHINGTON (AP) — Newly discovered fossils have given scientists their first real glimpse of when Earth made a crucial transition from plants and unrecognizably simple animals to the complex creatures ...

KUNMING — Chinese scientists have discovered well-preserved multicellular animal fossils in Ediacaran strata of eastern Yunnan province, indicating that complex animal communities existed in oceans ...

Scientists have uncovered the earliest fossil evidence of annelids (ringed worms) in Cambrian microfossils dating back approximately 535 million years ago. This discovery offers fresh insights into ...

The details of how animal life began are a bit murky. Most of the groups familiar today are present in the Cambrian, a period ...

Marshall said, "The Cambrian explosion was sudden because of the already rich developmental system that was in place.” “What fundamentally changed across this period is the way the animals on the ...