SETI astronomers search for radio signals, mostly from a specific band of the radio spectrum: the frequencies between 1.42 and 1.66 GHz. The millimeter and submillimeter radio bands remain almost completely unexplored for SETI.
The ANITA experiment, built to detect neutrinos, has detected very strange radio waves coming from deep below the Antarctic ice.
An international team of researchers has produced the first sharp radio maps of the universe at low frequencies. Thanks to a new calibration technique, they bypassed the disturbances of the Earth's ionosphere.
