Treasure trove of half-billion-year-old animal fossils in Grand Canyon
Fossils of some of Earth’s earliest animals have been found in one of the world’s most spectacular sites: North America’s Grand Canyon. The fossils date to between 507 and 502…
Fossils of some of Earth’s earliest animals have been found in one of the world’s most spectacular sites: North America’s Grand Canyon. The fossils date to between 507 and 502…