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1. Dictionary

   Ex·tinc·tion

   /ikˈstiNG(k)SH(ə)n/

   

   noun

   • 1. the fact or process of a species, family, or other group of animals or plants becoming extinct: "preventing the extinction of this unique frog will require the restoration of ponds and surrounding habitats"
   • ▪ the process of a particular thing ceasing to exist: "he joined the chorus of those predicting the extinction of newsprint"
   • ▪ the wiping out of a debt: "a private debt extinction fund"
   • 2. reduction in the intensity of light or other radiation as it passes through a medium or object, due to absorption, reflection, and scattering: "ultraviolet extinction"

   Word Origin late Middle English: from Latin exstinctio(n-), from exstinguere ‘quench’ (see extinguish).

   Scrabble Points: 19

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2. en.wikipedia.org › wiki › ExtinctionExtinction - Wikipedia

   en.wikipedia.org › wiki › Extinction

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   Extinction is the termination of a taxon by the death of its last member. A taxon may become functionally extinct before the death of its last member if it loses the capacity to reproduce and recover. Because a species' potential range may be very large, determining this moment is difficult, and is usually done retrospectively.

3. www.britannica.com › science › extinction-biologyExtinction | Definition & Examples | Britannica

   www.britannica.com › science › extinction-biology

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   Apr 23, 2024 · Extinction, in biology, is the dying out or extermination of a species. It occurs when species are diminished because of environmental forces (natural or human-made) or because of evolutionary changes in their members. Learn more about mass extinctions and modern extinctions.

4. www.nationalgeographic.org › encyclopedia › extinctionExtinction - National Geographic Society

   www.nationalgeographic.org › encyclopedia › extinction

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   Oct 19, 2023 · extinction. noun. process of complete disappearance of a species from Earth. fossil. noun. remnant, impression, or trace of an ancient organism. Jurassic. adjective. having to do with the time period between 190 million and 140 million years ago, characterized by an abundance of dinosaurs and ammonites.

5. www.nationalgeographic.com › mass-extinctionMass extinction facts and information from National Geographic

   www.nationalgeographic.com › mass-extinction

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   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...

6. www.nytimes.com › 2021/09/29 › climateThe Global Extinction Crisis - The New York Times

   www.nytimes.com › 2021/09/29 › climate

   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,...

7. www.nationalgeographic.com › animals › articleExtinct species, facts and information - National Geographic

   www.nationalgeographic.com › animals › article

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   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...

8. www.nationalgeographic.com › animals › articleWhat is extinction? The answer is complicated.

   www.nationalgeographic.com › animals › article

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   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,...