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STANFORD, Calif. – Just 99 years ago, the last passenger pigeon on the planet died at the Cincinnati Zoo. Today the Revive and Restore project is working to bring them back from the dead. They've also got their eyes on woolly mammoths. Other groups are pondering reviving everything from Tasmanian tigers to the dodo.
They're part of a growing movement among scientists, naturalists and visionaries working to bring back species that humans killed off over the past several thousands years. They call it de-extinctioning.
Ethicists, scientists, lawyers and biologists gathered at Stanford University Friday for a day-long conference to discuss a broader question: Even if we can, should we?
There are three ways scientists can bring back extinct species, said Beth Shapiro, who directs the paleogenomics lab at the University of California-Santa Cruz.
• Back breeding. An example is efforts to recreate the auroch, a European cattle ancestor that died off in Poland in 1627. By...