8 Theories About What Actually Happened to Amelia Earhart, Ranked From Most to Least Plausible

Was she eaten by crabs? Abducted by aliens? Here’s how the claims all stack up.

The story is famous, but the details are worth retelling. On July 2, 1937, Amelia Earhart and navigator Fred Noonan departed Lae, New Guinea, bound for Howland Island, where the Coast Guard cutter Itasca was waiting. Her final confirmed radio transmission at 8:43 a.m. local time said: “We are on the line 157 337... We are running on line north and south.”

Then she vanished. The U.S. launched the largest air-sea search in history to that point—two weeks covering an area roughly the size of Texas—and found absolutely nothing. Ever since, theories about what really happened to Earhart and Noonan have abounded. Here are the leading ones, ranked from the most plausible to the most outlandish.

1. Amelia Earhart’s plane crashed and sank in the Pacific Ocean.

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⚬ What the theory is: Unable to locate Howland Island, Earhart and navigator Fred Noonan ran out of fuel and ditched in the Pacific Ocean, where the aircraft sank in waters up to 18,000 feet deep.

⚬ Where it originated: This was the U.S. Navy’s official conclusion in 1937 and remains the U.S. government’s documented stance.

⚬ How likely it is to be true: Highly likely. This is the consensus view of most aviation historians, as it requires no extraordinary assumptions and directly aligns with Earhart's final radio transmissions reporting she was “running low” on fuel. But frankly it’s a bit depressing, so let’s consider some alternatives!

2. She landed on Nikumaroro, survived as a castaway, and was then eaten by crabs.

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⚬ What the theory is: Earhart missed Howland and landed on the reef of Gardner Island (now Nikumaroro), surviving briefly as a castaway. A grisly sub-theory suggests giant coconut crabs scavenged her remains, explaining why only 13 bones were found in 1940.

⚬ Where it originated: Developed since the late 1980s by The International Group for Historic Aircraft Recovery (TIGHAR).

⚬ How likely it is to be true: The most plausible alternative to an ocean crash. Despite dozens of post-loss radio signals, recovered 1930s artifacts, and multi-decade scientific investigations, no definitive evidence has successfully linked Earhart to the island. That includes a recent trip to Nikumaroro by Purdue University researchers, which came up empty-handed. But the whole eaten-by-crabs thing remains a tantalizing, if not entirely appetizing, possibility.

3. She turned back and crashed near Buka Island.

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⚬ What the theory is: Realizing she had insufficient fuel for the journey, Earhart reversed course toward New Britain or New Guinea and ultimately crashed near Buka Island.

⚬ Where it originated: Advanced by researcher William Snavely, who spent 13 years investigating a coral-encrusted aircraft wreck reported by local divers in the area.

⚬ How likely it is to be true: Unlikely. This theory directly conflicts with the U.S. Coast Guard cutter Itasca’s radio logs, which showed Earhart's signals growing stronger as she approached Howland, proving she was not flying away from it.

4. She was captured by the Japanese.

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⚬ What the theory is: Earhart landed or crashed in the Japanese-controlled Marshall Islands, was taken into custody, and transported to Saipan where she died in prison or was executed as a spy.

⚬ Where it originated: Popularized by Fred Goerner’s 1966 bestseller The Search for Amelia Earhart, relying on eyewitness testimony from island residents who recalled an American female pilot.

⚬ How likely it is to be true: Highly improbable. Despite strong popular belief and sheer volume of islander testimony, there is zero physical evidence, key photographs have been thoroughly debunked, and the islands sit roughly 800 miles off course. But it makes for great reading!

5. She was on a secret U.S. spy mission.

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⚬ What the theory is: President Franklin D. Roosevelt secretly tasked Earhart with overflying Japanese-held islands to photograph military installations, resulting in her being shot down or forced to land.

⚬ Where it originated: The theory stems largely from the 1943 Hollywood film Flight for Freedom, featuring a thinly veiled Earhart character who deliberately disappears to allow a Navy search.

⚬ How likely it is to be true: Extremely unlikely. Historians have found no reliable documentary evidence for such a mission, her plane lacked camera equipment, and the route makes no sense for reconnaissance. But it makes for an exciting movie script!

6. She was forced to broadcast as “Tokyo Rose.”

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⚬ What the theory is: Following her capture by Japanese forces, Earhart was forced to broadcast wartime propaganda over the radio as one of the infamous “Tokyo Rose” voices during World War II.

⚬ Where it originated: This rumor circulated widely among the American public during the war.

⚬ How likely it is to be true: False. Earhart’s husband, George Putnam, listened to the broadcasts at the Army’s request in 1944 and unequivocally stated none of the voices belonged to his wife. The “Tokyo Rose” persona was later shown to be multiple women.

7. She returned to the U.S. as a woman named Irene Bolam.

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⚬ What the theory is: Earhart survived Japanese captivity, was secretly returned to the U.S. after the war, and lived out her life under the assumed identity of New Jersey resident Irene Craigmile Bolam.

⚬ Where it originated: Proposed by Joseph Gervais and published in Joe Klaas’s 1970 book Amelia Earhart Lives.

⚬ How likely it is to be true: Thoroughly debunked. The real Irene Bolam called the claim a “poorly documented hoax” and sued the publisher. Forensic comparisons and verified documentation proved Bolam had a life history that predated 1937. So if you thought you’d never have to fight claims that you’re really a vanished celebrity living incognito, think again!

8. She was abducted by aliens.

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⚬ What the theory is: Extraterrestrials intervened during the flight over the Pacific Ocean, abducting Earhart, Noonan, or their Lockheed Electra aircraft and taking them off-world.

⚬ Where it originated: A fringe claim that emerged within popular culture as a sci-fi explanation for the total and sudden disappearance of the aircraft.

⚬ How likely it is to be true: Zero probability. This is a purely speculative fringe explanation lacking any credible evidence, serving only as a testament to the enduring public fascination with her vanishing. That is, unless there really is something out there.

Shawn Gorman
Deputy Editor

Shawn Gorman is Deputy Editor of News for Popular Mechanics. Before joining Pop Mech, he specialized in academic reading for educational testing. His diverse academic background also includes time spent as a lecturer and librarian at institutions such as the University of Kentucky, SUNY, and Harvard University. Shawn holds a Ph.D. in Modern Foreign Languages and Literatures from Boston University, an M.A. from The Ohio State University, and a B.A. in History from the University of Oregon. His favorite subjects to explore include computer science, physics, math, and biology. He lives on a medium-sized cat ranch in Easton, Pennsylvania, with his wife and two daughters.