As we near Halloween, it’s the perfect time to dig into some of Michigan’s strange tales, of which the state has no shortage.

And few are quite as out of this world as the UFO sightings that swept across the state in 1966.

Dozens of residents, including police officers, reported mysterious lights in the sky, and the official explanation that followed only fueled more questions.

Today, The ’Gander’s Sophie Boudreau takes us back to Michigan’s infamous “swamp gas” saga.

If you were a Michigander in 1966, you might recall the March UFO sightings that took our state by storm. (Raggedstone/Unsplash)

By Sophie Boudreau

Picture this: You’re settling in for a night with loved ones here in Michigan, flipping on the television for some laid-back viewing, and enjoying a favorite snack. Just as you get comfortable, something catches your eye outside. 

This unidentified flying object isn’t a set of car headlights, a low-flying plane, or a rogue bird wearing some sort of strange reflective device—it’s a bit more unusual, but you can’t quite put your finger on it. Your heart starts to pound with a combination of excitement and anxiety. Could you be looking at something … extraterrestrial? 

This scenario wasn’t so far-fetched for some Michiganders back in 1966, when a string of “close encounters” swept through the state. What followed was a combination of frenzied media coverage, additional sightings, and pushback by residents who felt certain their experiences couldn’t be explained away by science or logic.

Michigan’s so-called “swamp gas” UFO saga begins on the night of March 14, 1966, when Lima Township dispatchers were flooded with calls about unidentified flying objects across Ypsilanti, Monroe, Livingston, and beyond.

Days later, on March 20, a family noticed something unusual on their farm in Dexter. Frank Mannor, along with his wife and son, was startled by the sudden barking of their dogs, prompting a closer look at the backyard. What they saw was something out of a science fiction novel: Mannor reported a red object (sometimes described as a “falling star”) floating above an on-site marsh.

This wasn’t like anything they’d seen before—instead, as Frank explained, the object “was sort of shaped like a pyramid,” with a blue-green light on one side and a white light on the other (that turned “blood red” as they approached). “The body was like a yellowish coral rock and looked like it had holes in it—sort of like if you took a piece of cardboard box and split it open,” he added. As it flew away, they heard a loud and abrupt popping sound that added to the confusion.

The Mannors weren’t the only locals to see something unusual that evening. Indeed, they were far from it, as around 60 residents ultimately reported sightings. Multiple police officers from Dexter, including those dispatched to the Mannors’ land, also claimed to spot a similar object making its way overhead that night. 

And the mysterious sightings didn’t stop in Dexter. A so-called “mass sighting” took place the following night in the college town of Hillsdale, where dozens of people—including large groups of students—noted flashing lights hovering over the area. In the coming days, calls came in from Holland to Flint to Ann Arbor and beyond with reports of unexplained lights. 

So, how did Michigan officials choose to tackle the series of eerie events? Enter J. Allen Hynek, who would become a defining figure in the case. Hynek worked for the Air Force as a “UFO expert” and headed to Michigan to investigate multiple sighting locations. He even headed out to the Mannors’ farm to look for marks left by the “saucer,” though he was seemingly unswayed by residents’ speculation about aliens and flying spacecraft. 

On March 25, Hynek held a now-famous press conference during which he offered an explanation for the unusual lights: an optical illusion and/or chemical reaction caused by marsh gas—or swamp gas, as it was often called in the ensuing months. He even alluded to the possibility of a prank by college students in Hillsdale.

Hynek’s logic-based explanation landed poorly with many Michiganders. Even years after the sightings, “swamp gas” was used as a synonym for government conclusions that raised skepticism from the general public and even for UFOs themselves.

Do you think there’s a natural—or even a psychological—explanation for the mass sightings in Michigan? (tonny huang/Unsplash)

The backlash even reached Washington. Rep. Gerald Ford, the House minority leader and future president, called for a congressional investigation. That led to an independent University of Colorado study, which ultimately prompted the Air Force to shut down Project Blue Book.

The Michigan sightings themselves were never conclusively explained. Meanwhile, Hynek enjoyed further fame for his work, which ranged from inquiries into the potential origins of UFOs to advisory roles on Hollywood projects that dealt with extraterrestrials. 

The 1966 sightings represented several cultural phenomena: Not only were they taken seriously by law enforcement officers, many of whom reported seeing the lights themselves and ultimately pushed back on “simple” explanations, but they also marked an early foray into the modern 24-hour news cycle as outlets pushed for more and more information. 

Whether you believe in UFOs or think there’s a logical explanation for every seemingly inexplicable sighting, there’s no denying that the 1966 “swamp gas” reports deserve a spot among Michigan’s most far-out slices of history.

That One Time in Michigan is a special edition of our weekly newsletter. Know a story we should explore, or want to send me a note about the newsletter? Write to me here!

Want deeper coverage of Michigan politics? Our free Thursday newsletter, This Week in Michigan Politics, breaks down what’s happening in Lansing and Washington—clearly and without the jargon.

With the midterms approaching, we’ll keep you informed on what could affect your day-to-day life.

Interested?

Thanks for reading. This newsletter was written by Karel Vega with a feature story by Sophie Boudreau. It was edited by Crystal Niforos.

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