ANITA

If it's successful, the ambitious and innovative ANITA neutrino detector will be the first device to identify so-called high-energy neutrinos created by collisions between cosmic rays and cosmic microwave photons in space. Studying neutrinos from these sources offers an unprecedented opportunity to learn about exotic objects at the edge of the universe, such as black holes. Beginning in 2006, ANITA will be a balloon-borne radio detector experiment circling the Antarctic continent at 115,000 feet during approximately 18-day missions. It will scan the vast expanses of ice for telltale pulses of radio emission generated by neutrino collisions.

Source: http://www.pbs.org/wgbh/nova/neutrino/dete-04.html