Life at the start of the Ordovician remained confined to the seas ... Ordovician reefs were also home to large sea lilies, relatives of sea stars. Anchored to the bottom inside calcareous tubes ...

A researcher made the discovery when a larva comb jelly mysteriously "replaced" an adult comb jelly in his laboratory.

This sea teemed with marine life, its abundance and diversity rivaling modern-day sea life. However, in the Ordovician, the creatures were invertebrates, or organisms lacking a backbone, such as ...

A new study suggests that extreme temperatures could lead to a mass extinction event, ending the reign of humans and mammals ...

Although these new life-forms spread worldwide ... Like more familiar echinoderms such as sea stars and sea urchins, the Ordovician sea lily fossil and modern basket star shown here have a ...

Chinese scientists have found abiotic organic compounds in the ocean crust, shedding light on deep-sea carbon cycles and life ...

The Schmidt Ocean Institute shared footage from it's Chile Margin expedition on Instagram that shows a sparkling deep-sea ...

Learn how the rocks formed, take a look at the life in the ocean that covered this area ... were formed about 450 million years ago during the Late Ordovician Period, when a warm shallow sea covered ...

Some "extremely rare" fossils that date back 450 million years have revealed a new-to-science species. They were retrieved from a famous fossil site in New York State, USA – and best of all? They're ...

Oxygen, the molecule that supports intelligent life as we know it, is largely made by plants. Whether underwater or on land, ...

Researchers have uncovered a golden-colored, 450-million-year-old fossil of a new arthropod species, preserved in fool’s gold ...

The theory would explain the presence of an odd density of impact craters around the equator dating back to the Ordovician period ... ways over the course of its life. It’s been hot and fiery.