From The Hitchhiker's Guide to the Galaxy:
There is a theory which states that if ever anyone discovers exactly what the Universe is for and why it is here, it will instantly disappear and be replaced by something even more bizarre and inexplicable. There is another theory which states that this has already happened.
From this week's news:
If calculations of the newly discovered Higgs boson particle are correct, one day, tens of billions of years from now, the universe will disappear at the speed of light, replaced by a strange, alternative dimension, one theoretical physicist calls “boring.”
“It may be that the universe we live in is inherently unstable and at some point billions of years from now it’s all going to get wiped out. This has to do with the Higgs energy field itself,” [theoretical physicist Joseph] Lykken [of Fermilab] added, referring to an invisible field of energy that is believed to exist throughout the universe.
“Essentially, the universe wants to be in different state and so eventually it will realize that. A little bubble of what you might think of an as alternative universe will appear somewhere and then it will expand out and destroy us. So that’ll be very dramatic, but you and I will not be around to witness it,” Lykken told reporters before a presentation at the American Association for the Advancement of Science meeting in Boston this week.
And...has this happened already? We can't possibly know...but Douglas Adams might have known all along.