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Local natural history group Rhayader by Nature is delighted to present a talk by a leading international palaeontologist this ...

Turns out, there's more to the shark than sharp teeth and gills. Read on to learn about these misread sea dwellers.

Found in rock samples retrieved in Australia more than 60 years ago, the microfossils dating to the Lower Ordovician Period, approximately 480 million years ago, fill an approximately 25-million-year ...

After retirement, Sloan plans to move to Winona, where his wife Sally works as a professor of mathematics. He said he intends to study seashell fossils in southeastern Minnesota from the Ordovician ...

Nonvascular plants have no vascular tissues to transport nutrients and water. Nonvascular plants are believed to have appeared during the Ordovician Period, around 485 to 443 million years ago. Being ...

Excess gas before your period is a common symptom of premenstrual syndrome (PMS). Fluctuating hormones leading up to your period may affect the activity in your colon, leading to gas and other ...

Thanks to the column, we now know that at the start of the Paleozoic period the region where Virginia stands today was covered by a shallow sea. The latter was home to nautiloids, corals, bryozoans, ...

Founder and Executive director of the Edelman Fossil Park of Rowan University Paleontologist Dr. Kenneth Lacovara joins WIRED ...

Ediacaran; Ꞓ, Cambrian; O, Ordovician; CI, confidence interval ... They underscore the importance of extreme climatic events in the reorganization of terrestrial biodiversity. The 'boring billion' ...

Late or missed menstrual period Late period: 5 or more days late compared to normal menstrual cycle Missed period: no menstrual flow for more than 6 weeks Teen not using any birth control that stops ...

The Ordovician-Silurian mass extinction event may have wiped out some 85 percent of species, including many of the invertebrates this period is known for. Some scientists hypothesize the extinction ...