What are the most unbelievable historical coincidences ever recorded? Like the story of Thomas Jefferson and John Adams

The Jefferson-Adams coincidence is arguably the most poetic moment in American history—two rivals-turned-friends dying on the exact same day, which just happened to be the 50th anniversary of the Declaration of Independence.

But history has a few other tricks up its sleeve that feel more like “glitches in the matrix” than mere chance. Here are four of the most statistically improbable coincidences ever recorded.

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1. The Unsinkable Violet Jessop

If you were boarding a luxury ocean liner in the early 1900s, you either really wanted Violet Jessop as your nurse—or you wanted to stay far away from her.

• The Olympic (1911): Jessop was on board when it collided with a British warship. Both ships survived, but it was a massive disaster.
• The Titanic (1912): One year later, she was a stewardess on the Titanic. She was ordered into Lifeboat 16 and survived the sinking.
• The Britannic (1916): During WWI, she served as a Red Cross nurse on the HMHS Britannic. It hit a deep-sea mine and sank. Jessop jumped overboard, was nearly sucked into the propellers, but survived again.

2. The Twin Tragedy of Bermuda

In July 1974, a 17-year-old boy named Erskine Lawrence Ebbin was killed by a taxi while riding his moped in Hamilton, Bermuda.

The twist: Almost exactly one year later, his 17-year-old brother, Neville, was riding the same moped on the same street when he was struck and killed. He was hit by the exact same taxi, driven by the exact same driver, carrying the exact same passenger.

3. The “First and Last” Soldier

The first and last British soldiers killed in World War I are buried in the St. Symphorien Cemetery in Belgium.

• The First: John Parr

August 21, 1914

A 17-year-old reconnaissance cyclist killed just days after the war began.

• The Last: George Edwin Ellison

November 11, 1918

Killed just 90 minutes before the Armistice went into effect.

The Coincidence: Their graves face each other, separated by only 6 meters of grass. This wasn’t planned; the cemetery was designed by the Germans during the war, and the two men were buried at different times as the front lines moved. It was only after the war ended that the British realized the first and last casualties were staring at each other.

4. Mark Twain and Halley’s Comet

Mark Twain famously “predicted” his own death with celestial precision. He was born in 1835, on a day when Halley’s Comet was visible in the sky.

In 1909, he remarked:

“I came in with Halley’s Comet in 1835. It is coming again next year, and I expect to go out with it… The Almighty has said, no doubt: ‘Now here are these two unaccountable frauds; they came in together, they must go out together.'”

The Result: Twain died of a heart attack on April 21, 1910—one day after the comet reached its perihelion (closest point to the sun).