More than 500 million years ago, during what is known as the Cambrian period, the seas and oceans on Earth were filled with a ...

Researchers studying ancient rocks from the late Ediacaran period uncovered a fossil evidence that complex animal groups, ...

Animals of the Cambrian period went through one of the greatest evolutionary surges in history, known as the Cambrian Explosion. Animals of the Cambrian period likely began as worms or worm-like ...

Advances in imaging techniques reportedly debunks a purported "animal" fossil from long before the Cambrian explosion.

The details of how animal life began are a bit murky. Most of the groups familiar today are present in the Cambrian, a period when they rapidly diversified, with familiar features evolving alongside ...

A newly described species from the Burgess Shale had three eyes, clawed limbs, and a tail full of gills—plus internal organs preserved in stunning detail. Reading time 3 minutes A newly described ...

New research proposes the Brain-First Hypothesis: the evolution of the brain drove animal diversification during the Cambrian ...

The Cambrian period wasn’t just a chapter in Earth’s history – it was the plot twist that changed everything. What New Research Reveals About Cambrian Sociality Think again about the idea of ancient ...

Cambrian Period creatures known as sea moths seemed alien because of their additional eye, but a study finds anatomical features more in line with modern animals. An artist’s impression of Mosura ...

Here’s what you’ll learn when you read this story: Most of these fossilized animals are ancestors of modern invertebrates, including modern starfish, but a few among them count as ancient ancestors of ...

Spiders, crabs, and other arthropods evolved from a group of animals that underwent a burst of diversity around 500 million years ago. One fossil site provides an extraordinary glimpse into these ...