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  1. 5 de feb. de 2019 · REFERENCE. Extinct species, explained. Extinctions happen when a species dies out from cataclysmic events, evolutionary problems, or human interference. February 05, 2019. • 4 min read....

  2. La extinción se produce cuando los factores ambientales o los problemas evolutivos provocan la desaparición de una especie. La desaparición de especies de la Tierra es continua, y los ritmos han variado a lo largo del tiempo. Una cuarta parte de los mamíferos está en peligro de extinción, según las estimaciones de la Lista Roja de la UICN .

  3. 23 de abr. de 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

    19 de oct. de 2023 · By eliminating many large animals, this extinction event cleared the way for dinosaurs to flourish. Finally, about 65.5 million years ago, at the end of the Cretaceous period came the fifth mass extinction. This is the famous extinction event that brought the age of the dinosaurs to an end.

  5. 29 de may. de 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,...

  6. VANISHING. What we lose when animals go extinct. Animals are disappearing at hundreds of times the normal rate, primarily because of shrinking habitats. Their biggest threat: humans. No trace...

  7. www.nationalgeographic.org › topics › resource-library-extinctionExtinction

    Extinction. Extinction is the complete disappearance of a species from Earth. Species go extinct every year, but historically the average rate of extinction has been very slow with a few exceptions. The fossil record reveals five uniquely large mass extinction events during which significant events such as asteroid strikes and volcanic ...

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