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What is Extinction?

What is Extinction?. Extinction is the end of a group of organisms (normally a species). Extinctions are a normal part of evolution. Background Extinction Rate. Average Life Span of a species About 1 extinction/million species/year

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What is Extinction?

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  1. What is Extinction? Extinction is the end of a group of organisms (normally a species). Extinctions are a normal part of evolution.

  2. Background Extinction Rate • Average Life Span of a species • About 1 extinction/million species/year • Over 98% of all species ever to live on earth are now extinct. • How do we measure extinction rates using fossils?

  3. Mass Extinction: 50% or more of the living species die out suddenly http://dsc.discovery.com/earth/wide-angle/mass-extinctions-timeline.html

  4. With all this extinction, how do we still have so many species on Earth?

  5. Are we currently in a Mass Extinction? Some scientists say that up to half of all the organisms on Earth right now will be extinct by 2100

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