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  1. Sep 26, 2019 · SCIENCE. EXPLAINER. What are mass extinctions, and what causes them? In the last 500 million years, life has had to recover from five catastrophic blows. Are humans dealing the planet a sixth? By...

  2. Sep 29, 2021 · The Global Extinction Crisis. More than 20 species on the U.S. endangered list are now gone forever, officials said Wednesday. A million more are at risk. Share full article. Published Sept. 29,...

  3. May 29, 2019 · May 29, 2019. • 7 min read. Extinction is a natural phenomenon: After all, more than 90 percent of all organisms that have ever lived on Earth aren’t alive today. But humans have made it worse,...

  4. Feb 5, 2019 · Extinctions happen when a species dies out from cataclysmic events, evolutionary problems, or human interference. February 05, 2019. • 4 min read. The truth is, scientists don’t know how many...

  5. Dec 24, 2023 · At least five times, a biological catastrophe has engulfed Earth killing off the vast majority of species. As scientists say we’re in a sixth mass extinction, what can we learn from the past?

  6. Jan 13, 2021 · January 13, 2021. 10 min read. What We’ve Lost: The Species Declared Extinct in 2020. Dozens of frogs, fish, orchids and other species—many unseen for decades—may no longer exist because of...

  7. Stories. What is the sixth mass extinction and what can we do about it? © Roger Leguen / WWF. A mass extinction is a short period of geological time in which a high percentage of biodiversity, or distinct species — bacteria, fungi, plants, mammals, birds, reptiles, amphibians, fish, invertebrates — dies out.

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