Large mammal species live harder, die out faster

Throughout Earth’s history, species have come and gone, being replaced by new ones that are better able to cope with life’s challenges. But some species last longer than others, while others may die out sooner or evolve more quickly.

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<p><a href="http://www.physorg.com/news129385302.html">Large mammal species live harder, die out faster</a></p> <p>Throughout Earth’s history, species have come and gone, being replaced by new ones that are better able to cope with life’s challenges. But some species last longer than others, while others may die out sooner or evolve more quickly. </p>