the megafauna of north america went extinct in the quaternary period.
when did the megafauna of north america go extinct?
the quaternary period
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background extinction rates are typically measured in three different ways. the first is simply the number of species that normally go extinct over a given period of time. for example, at the background rate one species of bird will go extinct every estimated 400 years. another way the extinction rate can be given is in million species years (msy). for example, there is approximately one extinction estimated per million species years. from a purely mathematical standpoint this means that if there are a million species on the planet earth, one would go extinct every year, while if there was only one species it would go extinct in one million years, etc. the third way is in giving species survival rates over time. for example, given normal extinction rates species typically exist for 5–10 hundred thousand years before going extinct.
background extinction rate