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WHAT IS MASS EXTINCTION? HOW DID MASS EXTINCTION EVENTS INFLUENCE EARTH'S HISTORY?
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- What is the “sixth mass extinction event”?Which of the mass extinctions was the largest? What percentage of life went extinct during that time?If a sixth extinction event is occurring, how is it similar or different from the previous five mass extinctions? What sort of evidence do you think scientists look for to determine whether we are living through a mass extinction?
- What are some of the hypothesized causes of Earth’s biggest mass extinctions?What are the five mass extinctions of the past and the current theory of the sixth mass extinction? For each extinctions, what caused the extinction and how was ecosystem stability impacted? Was there any speciation that occurred afterward?According to Figure 2 above, how many extinction events contributed to the end-Ordovician mass extinction and when did they occur?