About 250 million years ago, at the end of the Permian period, something killed some 90 ... For years scientists have known that the deep ocean lacked oxygen in the late Permian.

oceans turning acidic, and up to 90% of Earth's species vanishing in the blink of an eye. This was the reality at the end of ...

in which 70 per cent of species on land disappeared along with 95 per cent of those in the oceans. This not only marked the end of the Permian period and the start of the Triassic, it was such a ...

Learn about the time period that took ... of Triassic life. The oceans teemed with the coiled-shelled ammonites, mollusks, and sea urchins that survived the Permian extinction and were quickly ...

The Permian period’s mass extinction had wiped out ... Dinosaur embryo found curled up and ready to hatch like a bird In the Triassic ocean, marine reptiles such as the plesiosaurs were kings.