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Science experiments like PICASSO and DEAP-3600 are trying to resolve one of the universe’s biggest scientific mysteries
The hottest thing in science today is cold. It’s also invisible, though it still manages to be heavy.
Dark matter — the mysterious stuff that physicists believe makes up a quarter of the universe but which no one has been able to directly detect — is having what the style world would call “a moment.” At this year’s American Association for the Advancement of Science (AAAS) annual meeting, the Fashion Week of science, dark matter talks were the Marc Jacobs fall collection: devotees crammed themselves into darkened rooms to get a glimpse of the Next Big Thing.
“I’ve been saying for a couple years now that the 2010s will be the dark matter decade,” says Sean Carroll, a theoretical physicist at the California Institute of Technology. With the discovery last summer of what is almost certainly the Higgs Boson, dark matter is the next big mystery in physics — and experiments designed to detect it are just beginning to show fruit.
Some of the most exciting are sitting in a mine shaft two kilometres below Sudbury, Ont.
By 2014, the SNOLAB underground laboratory will have five different experiments searching for what physicists believe dark matter is made of: WIMPs, or Weakly Interacting Massive Particles.