The Doomsday Clock Keeps Ticking Are humans the only beings in the universe confronting global self-destruction? Or just the last ones standing? Author: DENNIS OVERBYE Share this:Click to share on Twitter (Opens in new window)Click to share on Facebook (Opens in new window)Click to email a link to a friend (Opens in new window)Click to print (Opens in new window)MoreClick to share on LinkedIn (Opens in new window)Click to share on Reddit (Opens in new window)Click to share on Tumblr (Opens in new window)