A huge 75-foot-tall square boulder deep in Wyoming’s Bighorn Mountains has been baffling people since it was discovered.

the microfossils dating to the Lower Ordovician Period, approximately 480 million years ago, fill an approximately 25-million-year gap in knowledge by reconciling the molecular clock—or pace of ...

This session invites participants to journey back in time, drawing inspiration from ancient marine life such as trilobites, ammonites and brachiopods to sculpt their own “imaginary fossils ...

Scientists have struggled to trace the early evolution of mollusks, but the newly discovered fossil of Shishania aculeata ... similar to the bristles of annelid worms and brachiopods. The findings ...