Scientists heard their first pops this week in an experiment that searches for signs of dark matter in the form of tiny bubbles.
MORE: http://www.sciencedaily.com/releases/2013/05/130502185300.htm
See also...
What's the matter with antimatter? Scientists want to know
http://www.cnn.com/2013/05/02/world/europe/switzerland-antimatter/index.html?hpt=us_t5
