Most people have already heard about CERN's Large Hadron Collider over the last years of construction, for those that haven't I've embedded a rap video crash course on the LHC and particle physics to bring you up to speed.
If you want more info visit their site:[http://public.web.cern.ch/public/en/LHC/LHC-en.html]
For anyone (there are lots on youtube at least, mostly emo kids who actually know very little about physics and are out looking for attention) who is worried about the worlds biggest particle accelerator creating a black hole somewhere along or near the French-Swiss border, there are two places to be checking regularly.
[http://hasthelargehadroncolliderdestroyedtheworldyet.com/] and [http://hasthelhcdestroyedtheearth.com/]
If you know how, you'll get a kick out of viewing the source on those pages. For those who don't the first one contains logic that runs on your computer after getting the page which determines if the world still exists, in the code comments there's an email you can complain to in the event the world has ended and the site is incorrectly showing that it has not. In my experience building web apps people using Internet Explorer are likely the only ones who will find themselves in that position, which unfortunately is most of you.
The second site feels less legitimate but from an information standpoint is far more comprehensive. Providing in the code comments quotes of physicists contemplating what it would be like to live in a vacuum. They also have a subscribable feed for people that want to track whether the earth exists or not with a feed-reader. And finally poor search engine robots checking the robots.txt file to figure out what parts of the site to index are confronted with the message "robots will not save you".
We all know such a convoluted sentence would cause any robot reading it to explode, which in itself brings a feeling of totality to the world being destoyed(Google would have been the only thing that could have organized the vacuum into coherency and with their robots effectually deceased the post-black-hole world will just be nonsense).