Fossils of an intact root network, pollen, and spores discovered near the South Pole reveal a temperate rainforest existed ...
If you trace the animal family tree back through the fossil record, the trail usually goes cold about 539 million years ago. Before this boundary—the start of the famous Cambrian explosion—multicelled ...
Roughly 500 million years ago, a strange event in the evolution of life on Earth seems to have taken place. The known fossil ...