News tagged with cambrothyra

Geologist analyzes earliest shell-covered fossil animals

The fossil remains of some of the first animals with shells, ocean-dwelling creatures that measure a few centimeters in length and date to about 520 million years ago, provide a window on evolution at this ...

Space & Earth / Earth Sciences

created Oct 22, 2009 | popularity 4.7 / 5 (6) | comments 1