Extinction is a regular part of nature. An estimated 99% of all species that have existed on Earth have gone the way of the dodo, sometimes because a fitter competitor came along or their environment changed (often because of humans) and they couldn’t adapt.
While life can go on relatively unchanged after the extinction of some species, the loss of a keystone species — one that plays a significant role in its environment — can upend an ecosystem.
Now, researchers exploring the idea of “de-extinction” believe that science might be able to intervene and restore the balance.
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