Farther back in our planet’s history, volcanic eruptions, rapid climate change, and plummeting oxygen levels have caused at least four additional mass extinctions, with smaller pulses of biodiversity ...

Scientists have long treated mass extinctions as events locked deep in the fossil record. That framing now feels less distant ...

Could you run for 100 hours this year? How about just doing a little more than 15 minutes each day? In fact, these goals are essentially equivalent, but one certainly sounds more ambitious than the ...

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 ...

Extinction is inevitable. Expected. Almost all (99%) species that have ever existed have died out. Those disappearances have largely occurred at consistent background rates. But in the context of mass ...

The millions of species humans share the world with are valuable in their own right. When one species is lost, it has a ripple effect throughout the ecosystems it existed within.