Technical Sentences
Rewrite the following overlong or overloaded sentence by breaking it up into shorter sentences.
(77 words)
In the past 540 million years, there have been at least five, and as many as 20, distinct mass extinction events on Earth, whereby in all cases extinction was preceded by major climate changes, quickly changing atmospheric CO2, and a drop in sea levels, all of which led to up to 97% of all species being extinct and a recovery period of millions of years, which resulted in an entirely new set of species on the planet.
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