What happened
In mid-March 1966 southern Michigan was alive with reports of lights in the sky, some seen by sheriff's deputies. On the night of 20 March, farmer Frank Mannor near Dexter heard his dogs barking and saw a red 'falling star' settle over a marsh behind his house. He and his son crept toward it and described a football-shaped object with a quilted, waffle-like surface and blinking lights, which vanished and reappeared before shooting away. Police officers converging on the farm reported lights, and one patrolman said something flew over his car. The next night, 87 residents of a Hillsdale College dormitory, 50 miles away, watched glowing lights hover and dart over the campus arboretum for hours, taking notes, joined by the county civil defence director and police. Air Force consultant J. Allen Hynek flew in and, at a crowded Detroit press conference on 25 March, suggested marsh gas. The phrase became a national joke, and Congressman Gerald Ford demanded a hearing.
The official explanation
Hynek proposed that the Dexter and Hillsdale lights were glowing marsh gas, possibly spontaneous combustion of decaying vegetation in the wet spring thaw, and dismissed a deputy's photograph of the earlier lights as the Moon and Venus. He also mentioned student pranksters with flares at Hillsdale. Skeptics have since noted that both sites were next to marshland, that the descriptions at Hillsdale were of lights rather than structured craft, and that publicity from the first night may have primed the second. Hynek later wrote that the press frenzy made it almost impossible to interview Mannor properly.
The anomalous case
The witnesses included more than a dozen law officers and a dormitory full of students who logged their observations as they happened. Washtenaw County sheriff Douglas Harvey later recalled that Hynek told him privately there was something there they couldn't pin down, then announced swamp gas after a long phone call to Washington. The public reaction was so hostile that House Minority Leader Gerald Ford, the region's congressman, called the explanation flippant and demanded an investigation; his 1966 press releases are held at the Ford Library and highlighted by the National Archives. That pressure produced the April 1966 House Armed Services hearing, where Hynek broke ranks to say some UFO reports deserved serious study, and led directly to the Air Force-funded Condon Committee.
The strongest argument that this was something genuinely unknown or classified, with each claim attributed to the person who made it.
Documents
- Ford Press Releases - UFO, 1966 (Gerald R. Ford Presidential Library) official, fordlibrarymuseum.gov
Sources
- Michigan "swamp gas" UFO reports Wikipedia
- UFO or swamp gas? MI's "close encounter" 50 years later WKAR Public Media
- Do Records Show Proof of UFOs? National Archives
- Ford Press Releases - UFO, 1966 Gerald R. Ford Presidential Library
- Skeptoid #892: The UFO That Wasn't Swamp Gas Skeptoid
Witness reports elsewhere
These archives can't be republished here, so we link to them instead.