Saola: a discovery beginning with hunters' horns
Researchers began with unfamiliar hunting trophies rather than an encounter with a living animal.
An explanation existsAnnamite Mountains, Vu Quang
Atlas of mysteries
Items: 143All material
Petit-Rechain: a triangle photograph and its maker's admission
A photograph attributed to spring 1990 became an emblem of the Belgian wave. In July 2011 its maker told RTL-TVI that he had photographed a suspended polystyrene model.
Manipulation detectedPetit-Rechain, near Verviers
The Belgian wave: gendarmes, triangles and the limits of a radar record
Reports in 1989–1990 prompted an F-16 interception. The military acknowledged a failure to identify the phenomena; radar locks did not establish an extraterrestrial vehicle.
Under reviewEupen, Brabant and other Belgian regions
Sprites: an accidental recording above a storm
A low-light camera test turned accounts of flashes above thunderstorms into a reproducible field of atmospheric science.
An explanation existsUniversity of Minnesota observing campaign
JAL Flight 1628: lights over Alaska and a disputed radar return
A cargo Boeing crew reported unusual lights. The FAA preserved communications and interviews, attributing an extra ground-radar target to a split return from the aircraft itself.
Under reviewFort Yukon–Fairbanks–Anchorage flight corridor
Nyos: the night a lake released gas
Sudden deaths of people and animals were investigated through water, gas and terrain measurements.
An explanation existsNorthwest Region
Lake Monoun: an invisible gas wave
A crater-lake gas release killed 37 people and helped reveal the hazard of carbon dioxide accumulated in deep water.
An explanation existsLake Monoun, West Region
Hessdalen: lights under instrumental observation
A winter campaign attempted to turn reports of lights into testable measurements.
Insufficient evidenceHessdalen valley, Trøndelag
Trans-en-Provence: a landing account and a ground trace
A single-witness 1981 account investigated by the gendarmerie, GEPAN and laboratories.
Insufficient evidenceVar, near Trans-en-Provence
Rendlesham Forest, 1980: lights, a memorandum and later accounts
Servicemen reported lights in the forest; surviving records distinguish the early account from later additions.
Insufficient evidenceRendlesham Forest and RAF Woodbridge area, Suffolk