In case you don't have enough to worry about
Two new ways the world can end.
"Our Final Invention: How the Human Race Goes and Gets Itself Killed". (I would have thought Asimov's Three Laws of Robotics took care of this but apparently not.)
Old ways: "10 Recent Times the World Almost Ended".
Far less dramatic than the end of the world, but still worrisome . . .
But take heart: some people have been compiling advice for what to do if a (small) nuke goes off in your city.