[ajuc]

Maybe it would require a little less energy, if instead of generating our own neutrinos, we modulated the neutrinos that go throught the Earth from sun - no nuclear reactor required, "just" a huge fast moving lead block :)

EDIT: also - what happens, when neutrino passes event horizon? Because maybe we could modulate neutrinos stream using very small black holes :)

[rlpb]

Also, if we could just modulate the entire Sun, we'd have a very effective cross-galactic communication device.

[pavel_lishin]

Modulating solar neutrinos is a good idea, but you could only send a message to someone on the other side of the planet, and then you'd have to wait twelve hours to get a reply.