tag:techtv.mit.edu,:Array/185908320 2007-07-12 19:22:00 -0400 msrp2007 Searching for Dark Needles in the Cosmic Particle Haystack 4441 tag:techtv.mit.edu,:Array/185821560 2009-06-12 15:38:50 -0400 MIT Department of Physics Technical Services Group Subatomic particles such as cosmic ray muons, alpha particles, and high energy electrons are striking our bodies all the time. In the cloud chamber, these particles ionize air molecules, creating delicate cloud trails by condensing supersaturated alcohol vapor. This is similar to the way condensation trails are formed in the sky behind airplanes. <br><br> This is about as close as you'll ever get to seeing subatomic particles with your own eyes... 157 tag:techtv.mit.edu,:Array/185758880 2009-06-25 14:11:12 -0400 MSRP 2009 "Neutrino Backgrounds to Dark Matter Searches and Directionality," presented 6/18/2009 2364 tag:techtv.mit.edu,:Array/185723440 2009-06-25 14:14:54 -0400 MSRP 2009 "The Search for Dark Matter." Recorded 6/18/2009 0