180-Million-Year-Old Fossils Revealed in Jurassic Deep Sea

Ancient fossils now reveal that the deep sea may be the origin of many lineages of sea creatures found closer to the surface, such as a number of sea stars, sea urchins and snails.

May 21, 2014
2:00 PM EDT
A fossil of a sea urchin. Close relatives of this sea urchin still live in the present-day deep sea. | Andreas Kroh