The: Philadelphia Experiment

: Witnesses supposedly saw a strange greenish-blue fog envelop the ship before it disappeared.

The is a legendary military urban legend alleging that the U.S. Navy conducted a secret experiment in 1943 to make the destroyer escort USS Eldridge invisible to enemy radar . The story claims the ship not only vanished from the Philadelphia Naval Shipyard but was inadvertently teleported over 200 miles to Norfolk, Virginia, and back again. Interesting Content & Claims The Philadelphia Experiment

: The Office of Naval Research ( ONR ) was so intrigued by Allen’s annotations that they actually printed 127 copies of the book with his notes included—now a prized collector's item. Fact vs. Fiction Philadelphia Experiment : Witnesses supposedly saw a strange greenish-blue fog

: The story didn't surface until 1955, when a man named Carl M. Allen (writing as "Carlos Allende") sent a series of annotated books and letters to UFO researcher Morris K. Jessup . The story claims the ship not only vanished

: The most famous (and gruesome) part of the legend is that crew members suffered terrifying consequences: some went insane, others vanished entirely, and several were allegedly found with their limbs fused into the steel hull of the ship.

: The experiment was purportedly based on Albert Einstein 's unfinished "Unified Field Theory," which aimed to link the forces of gravity and electromagnetism.