The recent claim the long extinct dire wolf was resurrected made headlines around the world. But bioethicists and ecologists say there are ethical concerns.

Three white puppies were born in the last six months, each through surrogate domestic dogs who had no idea they were carrying an extinct species.

Real or hybrid, news of the resurrection of the dire wolf is a big deal with huge implications for conservation efforts, the advancement of science, and the business of bioscience.

Some question whether the pups are really dire wolves, or just genetically tweaked gray wolves. But the technology could be used to help at-risk animals.

A biotech company made history with the birth of three genetically engineered wolves: What we know about these prehistoric ...

Besides reviving the extinct dire wolf, Dallas' Colossal Biosciences is also working to bolster the critically endangered Eastern red wolf population.