Speaking at Arizona State University’s commencement ceremony this month, actor Harrison Ford told graduates to “extend social ...

Add Yahoo as a preferred source to see more of our stories on Google. No species lasts forever — extinction is part of the evolution of life. But at least five times, a biological catastrophe has ...

Add Yahoo as a preferred source to see more of our stories on Google. A wildfire frontline with emergency services nearby, Okanagan Valley, British Columbia, Canada. Farther back in our planet’s ...

Humans have wiped out hundreds of species — with many more on the brink or experiencing large declines in population. Some scientists have argued that we have entered a “sixth mass extinction” event ...

(CNN) — Humans have wiped out more than 100 species — with many more on the brink or experiencing large declines in population. Some scientists have argued that we have entered a “sixth mass ...

Earth has a flair for dramatic resets, though it usually takes millions of years to deliver them. Over its long history, life has been knocked back by volcanic eruptions, climate swings, changing seas ...

Scientists discovered hidden phosphorus spikes in ancient limestone that may help explain two of Earth’s worst marine mass ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. No species lasts ...

CNN — (CNN) — No species lasts forever — extinction is part of the evolution of life. But at least five times, a biological catastrophe has engulfed the planet, killing off the vast majority of ...