Discovery theme

Strange signals

Radio, radar, audio, broadcast and astronomical signals whose origin or interpretation became central to the case.

Strange signals14 entries

Scientific Anomalies & Natural Phenomena

The Wow! Signal: Seventy-Two Seconds at Big Ear

The Wow! signal was a one-time narrow-band radio event near the hydrogen line, recorded on 15 August 1977. Its shape was noteworthy; its source remains unconfirmed.

uncertainpublicFormer Big Ear radio telescope site near Delaware, Ohio15 August 1977

Scientific Anomalies & Natural Phenomena

The Taos Hum: A Sound the Instruments Could Not Share

The Taos Hum became a public problem in the early 1990s when residents described a distant-engine sound. Researchers documented sincere reports but found no common external source.

uncertainpublicTaos, New Mexico; representative town pinPublic reports concentrated in 1992–1993