Thank god for the scientists, researchers and doctors that invested their careers into developing and perfecting antibiotics. Without them, the world would be a much sicker place, and many of man's achievements over the past two centuries would not have been possible -- or at least incredibly delayed.

But what started out as a life-saving, world-changing breakthrough has, as we all know, gotten to be an increasingly cautionary tale: use it (too much) and lose it.

And it's not just overuse of antibiotics in humans, of course, that is concerning.