Should we try to bring extinct species back to life?

The science behind cloning endangered animals or bringing back already-extinct species is as interesting as it is controversial.
National Geographic addresses this in their April issue, featuring a video where experts express their divergent opinions on the subject. But, NatGeo also goes a step beyond the traditional debate to discuss a concept with more widespread implications: de-extinction.
In a broad sense, de-extinction refers to a more complete extinction reversal. So instead of just bringing back, say, one wooly mammoth, scientists would try to bring back a whole population. As one video commentator put it, "let it restore the balance in that ecosystem."
Good idea? Bad idea? Let us know what you think in the comments section and consider tuning into the National Geographic Channel at 8 p.m. EST on April 12 if you’re interested in the subject of de-extinction. A one hour special called “Mammoth: Back from the Dead” is on the schedule. That’s sure to be a catalyst for further debate.