The Cambrian explosion, long hailed as one of the most significant events in the history of life on Earth, has now been brought into question. New research suggests that this dramatic burst of ...

Researchers found fragments of fossils representing prehistoric mollusks, crustaceans and worms among rocks at the Grand Canyon. Mussini et al. More than half a billion years ago, strange worms and ...

Imagine being transported 500 million years into Earth’s past, landing in a world that feels both alien and dangerously unfamiliar. You have just arrived in the Cambrian Period, a time when life on ...

The fossils date back to the Cambrian Explosion around half a billion years ago when animal life was evolving in new ways. Within the walls of the Grand Canyon, researchers have discovered thousands ...