Bioengineers have been using the technology to bring back species not seen on this planet for decades. We should consider the possible consequences, however, before embarking on a massive “de-extinction” excursion.

Despite what Casper may have suggested, it’s still not possible at this time to resurrect the dead beyond resuscitating someone whose heart stopped. However, scientists have been able to bring back a species of frog that has been extinct since the 1980s through cloning processes and DNA that has been frozen since the 1970s. The…