The extinct passenger pigeon, a prime example of what happens when settlers hunt animals with no regard for reproductive cycles, might get a chance to exist again, thanks to science. A group of scientists in Washington, D.C. is figuring out if a passenger pigeon revival is scientifically possible, but the other issue is the morality of unnaturally bringing a species back from extinction, which we fully support. More pigeons cannot be a bad thing.

(Photo: Curious Expeditions/Flickr)