Since the first sharks emerged in the world’s oceans nearly half a billion years ago, the world has gone through five major ...

Journal of Paleontology, Vol. 90, No. 6 (2016), pp. 1027-1048 (22 pages) Catenipora is one of the most common tabulate coral genera occurring in various lithofacies in the Upper Ordovician Xiazhen ...

Geochemical Records Reveal Protracted and Differential Marine Redox Change Associated With Late Ordovician Climate and Mass Extinctions. AGU Advances, 2022; 3 (1) DOI: 10.1029/2021AV000563 ...

Two intense spells of volcanic activity 450 million years ago triggered a period of global cooling and falling oxygen levels in the oceans, leading to the extinction of 86 percent of all marine life.

Scientists recently discovered two fossilized specimens of these ancient and peculiar organisms, describing one of them as a new species. The fossils, which were excavated from a Welsh quarry on ...

Nature is in crisis, and it's only getting worse. As species vanish at a rate not seen in 10 million years, more than 1 million species are currently on the brink.

Scientists have identified several new marine species in a pristine underwater ecosystem recently discovered in international waters -- and they expect to find more. Modern technology that allows ...

The Fish and Wildlife Service said 21 species, including a mammal, birds, fish and mussels, are being removed from the endangered list because they're now considered extinct.

The species, including birds, mussels and a bat, have been moved off the threatened and endangered list. They join 650 other species that have gone extinct in the U.S.

Dr. Dufresnes’s method for finding new species takes a lot of work in the field. Other researchers have looked for more efficient ways to identify species. One popular method is to sequence DNA ...

In South America, which is home to the Amazon Rainforest, 3,356 out of the 13,668 assessed tree species are at risk of extinction due to deforestation for crop farming and livestock ranching.