Some 500 million years ago, there were no plants or animals on land. But the seas were crowded with living things that looked like creatures from a science fiction movie.
Courtesy D.W. Miller
Mailing Address PO Box 37012 MRC 941 Washington, DC 20013-7012 202.633.3168 (tel.) 202.633.5347 (fax) Delivery Address 470 L'Enfant Plaza, SW Suite 7103 Washington, DC 20024
Mailing Address PO Box 37012 MRC 941 Washington, DC 20013-7012 202.633.3168 (tel.) 202.633.5347 (fax)
Delivery Address 470 L'Enfant Plaza, SW Suite 7103 Washington, DC 20024
