Add Yahoo as a preferred source to see more of our stories on Google. After an ancient extinction killed about 85% of marine species, survivors in isolated refuges helped jawed vertebrates diversify ...

Add Yahoo as a preferred source to see more of our stories on Google. A pair of 'Sacabambaspis' fish, around 14 inches (35 centimeters) in length, which had distinct, forward-facing eyes and an ...

A pair of Sacabambaspis fish, around 35 cm in length, which had distinct, forward-facing eyes and an armored head. No fossils of animals like Sacabambaspis from after the Late Ordovician Mass ...

The “Big Five” mass extinctions of the Phanerozoic Eon have long attracted significant attention from the geoscience community and the public. Among them, the Late Ordovician Mass Extinction (LOME) is ...

Paleontologists recognize five big mass extinctions in the fossil record. At the end of the Ordovician period, about 443 million years ago, an estimated 86 percent of all marine species disappeared.

The world and its ecosystems have been around for a long time — so long that the first mass extinction occurred “just shy” of 445 million years ago. “This mass extinction event in the Ordovician, this ...

A new study proposes a refined stratigraphic scheme for the Sanqushan Group, clarifying the Katian Zhe-Gan platform stratigraphy in South China. By integrating sedimentologic and paleontologic data, ...

Mass extinction : a general view / Ashraf M.T. Elewa -- Late Ordovician mass extinction / Ashraf M.T. Elewa -- The end Ordovician : an ice age in the middle of a greenhouse / Curtis R. Congreve -- ...

Rapid changes in marine oxygen levels may have played a significant role in driving Earth's first mass extinction, according to a new study. Rapid changes in marine oxygen levels may have played a ...

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