Did plants nearly wipe out all marine life on Earth—twice?

UC College of Arts and Sciences Professor Thomas Algeo has been studying the planet's five major mass extinctions since the ...
CNN

Supernovas may have played a role in two of Earth’s largest mass extinctions, study suggests

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Violent supernovas ...
IBTimes UK

Elementary new theory on mass extinctions that wiped out life on Earth three times

Throughout the past 600 million years there have been five major mass extinction events that devastated life on Earth. While some of these events are very well studied, such as the killer asteroid ...