“The Known Unknowns” –All Species that Exist Today – Including Human Beings – Will Go Extinct

 

“Paleontologists know there are key moments in Earth’s history when extinction rates are high. For example, researchers have identified the Big Five mass extinctions: the five times over the past half billion years or so when more than three-quarters of the planet’s species have gone extinct in short order. Unfortunately, we are also now getting a good firsthand view of what extinction looks like, with the rapid increase in extinction rates over the last century.”

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