You could never make one small enough to be portable, but as a radio engineer, neutrino modulation radio is the technology I've been waiting for all my life, ever since I read about neutrinos at age 12.
It could make planetwide communication possible without satellites or transoceanic submarine cables.
12 posted on 03/19/2012 7:37:37 AM PDT by backwoods-engineer
(I will vote against ANY presidential candidate who had non-citizen parents.)