Rare evidence about the lives of an ancient group of arthropods has been uncovered in the U.S. The findings of the study are published in the journal Biology Letters. The cluster of cyclidan ...

Triops or Tadpole Shrimp (Triops longicaudatus) also called "living fossils" this genus have been found in rocks hundreds of millions of years old. Triops are commonly sold in kits as pets.© Dan Olsen ...

One of several Jianfengia fossil specimens: The animal's body plan is extremely simple, consisting of numerous identical segments. However, its head is like that of a more modern crustacean, with eyes ...