I read this interesting article with mixed emotions. I can see the good applications for such a discovery, but I also have concerns.

There is thought that if they could find testicles of Wooly Mammoths that it is possible to revive the species or to at least produce a hybrid. This is the thought that concerns me. Yes, it would be fascinating to see a Wooly Mammoth, but do they belong in this time. Does this put us too close to the trap of  'playing God'? Everything they know about Wooly Mammoths is based on archaeological finds, these may or may not be accurate. Mammoths may be too dangerous to humans and today's environment to be alive now.  I really believe we need to be careful about reintroducing extinct species. Already, we see evidence of how things can go wrong when species are introduced into foreign environments (pythons in the Everglades for example). 

On the other side, if this would give us a way to keep alive species that are currently dying out that would be terrific. As they do belong to this time and climate and it would be nice if our science could undo some of the damage we have done.

I am interested in hearing your thoughts.