Since there are so many animals on earth, it’s impossible to know how many die every year. However, we can estimate how many species go extinct per year. We know from the fossil record that during normal years 10 to 100 species go extinct. This number includes bacteria and fungi as well as larger species.
During mass extinctions, like the one that is happening now, the numbers are much higher. Scientists estimate that species are now going extinct at 100 to 1,000 times the normal rate.
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