Researchers used digital and mathematical simulations to test whether they could be subatomic particles known as neutrinos, but it is unlikely. By detecting these particles, ANITA was giving insight into distant cosmic events. Related Story NASA Detected GPS Signals From the MoonANITA detected anomalous signals coming from below the horizon, at unusually sharp angles some 30 degrees below the icy surface. Most neutrinos interact with nothing, but tau neutrinos will interact with ice. But, despite that, the signal turned out not to be coming from neutrinos or tau neutrinos.