A Family Found a Strange Metal Sphere in the Woods. It Started Moving on Its Own—Then the Navy Got Involved.

Popular Mechanics

A Family Found a Strange Metal Sphere in the Woods. It Started Moving on Its Own—Then the Navy Got Involved.

Caroline Delbert
6 min read

betz mystery sphere
Is the ‘Betz Mystery Sphere’ Really Alien Tech? Florida Times-Union Archive/WJCT

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Here’s what you’ll learn when you read this story:

  • Some still question the origins of the strange steel ball that a Florida family found on their property in 1974. Could it be alien technology?

  • The military—and even ufologists—examined the sphere, concluding that humans made the bizarre orb.

  • Yet, the Betz mystery sphere conspiracy theory continues to persist. Is there any validity to it?


Picture this: you walk outside and into your yard and discover a strange metal sphere that’s a little smaller than a bowling ball (a diameter of eight inches), but a solid eight pounds heavier than even the sturdiest professional bowling bowl that players use (22 pounds).

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That’s exactly what happened in 1974, when the Betz family found what is now known as the eponymous “Betz mystery sphere” near their home in Fort George Island, Florida.

wayne betz touching the sphere in black and white
Wayne Betz with the sphere. Florida Times-Union Archive/WJCT

The Betz family said the sphere acted of its own accord, moving and making noises. What does this surprising backyard shot-put have to do with conspiracy theories? Is it some kind of autonomous cannonball? Could it actually be a piece of alien technology?

Origins of the Betz Sphere Conspiracy Theory

After a fire destroyed their property in March 1974, the Betz family found the bizarre metal sphere in their yard, and believed it was a historic cannonball from Florida’s Renaissance-era Spanish colonizers, the Skeptoid podcast explains. But the sphere was clean, free of corrosion, and shiny. Weaponry in the Spanish colonial time period, unlikely from Florida’s missionaries to begin with, would have been made of iron or stone—not stainless steel or silver plate.

When the family took the sphere home, they said, it started to behave by itself. Their accounts detailed the sphere rolling by itself, making noises, and vibrating.

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From Wonderful Engineering:

Terry, the son of Antoine and [G]erri Betz, was playing guitar and found that the sphere reacted to the sound of the guitar and made a throbbing noise which scared the family dog. Things took an even odder turn when they were sitting on the floor and rolling the sphere towards one another. When it was sent in one direction, it would change direction midway and head back to the person who rolled it.

the april 15 1974 edition of the st petersburg times
The April 15, 1974 edition of the St. Petersburg Times. St. Petersburg Times/Google News Archives

In an April 1974 interview with the St. Petersburg Times, Gerri Betz said when the family dog got next to the sphere, “she began to whimper and cover her ears with her paws, something I’ve never seen her do before.”

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The Betz family suspected solar radiations affected the sphere, which may have been why it reportedly moved “intensely” when the sun shone brightly, according to Wonderful Engineering. Eventually, the U.S. military got their hands on the sphere to analyze it for more answers.

When an expert from a research firm in Baton Rouge, Louisiana examined the sphere, he “found radio waves coming from it and a magnetic field around it,” Gerri Betz told the St. Petersburg Times. Then, the U.S. Navy analyzed the sphere at Jacksonville Naval Air Station. A Navy spokesman told the St. Petersburg Times that the Navy’s first x-ray attempts failed because its “machine wasn’t strong enough to penetrate the steel, but two subsequent tests showed the contents of the globe.”

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“I don’t know who manufactured it, the spokesman said, “but I say it came from Earth. We do know it is not an explosive and presents no hazard.

The Betz family then sent the sphere to astronomer and renowned ufologist J. Allen Hynek for examination, but he also agreed the object was human-made, according to The Jaxson.

The Believers

The popular Mysterious Universe podcast reported on the Betz mystery sphere with the headline “Alien Artifact or Doomsday Device,” tipping their hand about the possible explanations among believers. A scientist could have disabused the Betz family of their far-out ideas like 16th-century 431 steel, silver plating, or an improbably solid metal satellite.

Still, their account of the sphere’s motions and noises made local news and continues to inspire believers. Even a quick browse on Reddit shows that the Betz mystery sphere conspiracy theories are alive and well. Here’s just a sampling of the ideas anonymous posters have offered up on the r/aliens subreddit:

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  • The “government opened it and stole the fillings!”

  • “My opinion it was some sort of drone, apparently it would roll back to whoever previously held it.”

  • “Maybe this was is what orbs look like when they’re not lit up. Many people have reported orbs look like metallic spheres when their lights go out. Maybe this was a damaged/broken one?”

  • “I’ve seen the exact same thing pulled through big drainage pipes to declog them. They also move on their own when placed on a flat surface.”

betz mystery sphere
The Akron Beacon Journal/WJCT

The Facts

The widely-reported explanation for the Betz mystery sphere is so neat that it’s failed to persuade believers. After the Navy examined the sphere and identified its steel composition, among other facts, the ball was conclusively compared with a stainless steel ball kept in stock by a Jacksonville equipment supply company, Skeptoid reports.

Upon seeing news reports of the mystery sphere, the president of that company, Robert Edwards, showed a reporter a Bell & Howell stainless steel ball that was eight inches across and weighed over 21 pounds—almost exactly the same size as the sphere. From Skeptoid:

“I’m not saying that this thing didn’t come from outer space because I’ve never seen it,” said Edwards. All I’m saying is that the physical description of it matches exactly the type of ball we have in stock.”

As for the noted behaviors of the sphere, these have been repeated and festooned with extra details over the last 52 years. In reality, the sphere was probably rolling on an uneven floor, experts say.

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As the Navy spokesman told the St. Petersburg Times:

“I believe [the sphere moved] because of the construction of the house. It’s old and has uneven stone floors. The ball is almost perfectly balanced, and it takes just a little indentation to make it move or change direction.”

The Case

It’s unlikely that even an advanced alien technology would use an Earth steel alloy—431, used in aircraft and things like fasteners and bolts, per Skeptoid. It wouldn’t remain unblemished on the long, extremely hot fall to Earth. Not even a solid steel ball would escape damage.

But the Navy investigation and a series of “inconclusive” examinations have led believers to think the sphere is a UFO. In the U.S., that meant persuading someone in exchange for a financial reward. Based on mixed information, they believe there are different sections of different materials inside the sphere, making it unknown to terrestrial science despite being coated in a carefully human-developed steel alloy.

The Verdict

It’s easy to see how a regular family in Florida would decide a strange object in their yard had some kind of improbable properties. In the absence of clear scientific input about it, that legend could grow very quickly. And the 1970s were a heyday of belief in things like UFOs as well as “new religious movements” and Americanized transcendental meditation—a heady mix for people to develop some wild ideas.

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But the reality is that the ball’s existence can probably be chalked up to a regular manufactured object that got lost. If you ever get ahold of the Betz mystery sphere, consider taking it to your local bowling shop and getting some holes drilled.

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