Destroying the planet, one species at a time

So now we're trying to save rhinos?

http://www.foxnews.com/science/2013/07/21/ohio-zoo-tries-to-mate-rhino-siblings/

We should not have hunted and crowded them to extinction in the first place.

By the time we figure out that a single species (i.e., humans only) planet is not a workable scheme, it will be far too late to save ourselves.