PhD student Anthony Clarke used a method of measuring radioactive decay on volcanic ash layers to determine the approximate age of these fossils. The results confirmed Professor Cope’s estimate. At ...

University of Rochester researchers studied Earth’s magnetic field during the transformative Ediacaran Period, which spanned from about 635 to 541 million years ago. The research raises ...

This was when the Ediacaran Period, which spanned 94 million years from the end of the Cryogenian Period, 635 million years ago, moved into the Cambrian Period around 541 million years ago. To put ...