A mass extinction event wiped out around 90% of life. What followed has long puzzled scientists: The planet became lethally ...

The 5 mass extinctions . Ordovician-Silurian extinction: ~ 440 million years ago. Species made extinct: 85%. By the end of the Ordovician Period the seafloor was teeming with shelled creatures ...

A study of fossils from the Permian-Triassic extinction event 252 million years ago shows that forests in many parts of the ...

The 5 Mass Extinctions That Have Swept Our Planet From the Ordovician period to present day where we may be experiencing a sixth mass extinction, here are the mass extinctions that repeatedly wiped ...

This coincided with a mass extinction, likely the worst in Earth's history.Start the day smarter. Get all the news you need ...

Of the five mass extinctions, the Permian-Triassic is the only one that wiped out large numbers of insect species. Marine ecosystems took four to eight million years to recover.

Five Mass Extinctions Wiped out 99 Percent of Species That Ever Lived—Are We Headed for the Sixth? Published Jun 30, 2017 at 9:13 AM EDT Updated Nov 17, 2017 at 10:56 AM EST.

The Big 5. These five mass extinctions have happened on average every 100 million years or so since the Cambrian, although there is no detectable pattern in their particular timing.

While the causes of the “big five” mass extinctions varied, understanding what happened during these dramatic chapters in Earth’s history — and what emerged in the aftermath of these ...

A mass extinction - the sixth of its kind in our 4.5-billion-year history - is well underway and humans are to blame.. That somber assessment comes from a new study Thursday in Science, which ...