Here’s the bad news: we’ve all got just 100 seconds to live. Here’s the good news: they’re metaphorical seconds, but the fact is we’ve got just 100 of them and when they tick down, it really could be the end of human life. That grim assessment comes from this morning’s update of the Bulletin of the Atomic Scientists‘ Doomsday Clock, announced at a press event in Washington, DC, during which the venerable nuclear watchdog group made its annual announcement of how close humanity is to destroying itself by the twin threats of nuclear weapons and climate change.