The Wow! Signal: A strong radio signal detected in 1977, which remains unexplained and has sparked speculation of extraterrestrial origin.
The Tunguska Event: An enormous explosion that occurred in 1908 in Siberia, attributed to a meteor or comet impact, but without a definitive explanation.
Hessdalen Lights: Unexplained lights observed in the Hessdalen Valley, Norway, known for their appearance in different colors and shapes.
Marfa Lights: Mysterious glowing orbs observed near Marfa, Texas, which appear and disappear without a clear explanation.
Nazca Lines: Enormous geoglyphs etched into the desert floor in Peru, whose purpose and origin remain a subject of debate and speculation
Baltic Sea Anomaly: A strange object discovered in the Baltic Sea resembling a sunken ship or ancient structure, but its true nature remains unidentified.
The Bloop: An ultra-low-frequency sound detected in the Pacific Ocean, initially attributed to a massive unknown creature but later determined to be of geological origin.
The Taos Hum: A low-frequency humming sound reported by residents of Taos, New Mexico, which persists despite extensive investigation and remains unexplained.