EARTH-penetrating neutrinos might one day be used to send messages to lurking submarines. The scheme may provide one-way communication without requiring subs to surface.
Neutrinos are particles that interact so weakly with matter that they can pass through the planet like light through glass. In 1977, physicists proposed that they might be around, or through, the globe. But because neutrinos interact so rarely, the conclusion was that it would be almost impossible to detect a signal.
Now advances in emitters and detectors make a neutrino com-link feasible in the near future, says physicist …
