The mystery of the American vessel “Mary Celeste,” sighted adrift in the Atlantic Ocean east of the Azores on December 5, 1872, by the British ship “Dei Gratia,” remained one of the paramount maritime enigmas for a century and a half. Upon discovery, the sailing ship was perfectly intact, showing no signs of damage, struggle, or piracy. All cargo and personal belongings were in place, yet ten individuals, including Captain Benjamin Briggs, his family, and the crew, had vanished without a trace. For decades, every conceivable hypothesis was floated—from disease outbreaks to supernatural occurrences—but contemporary physico-chemical analyses have finally yielded a rational explanation for the events.
The Chemical Nature of the Enigmatic Hold Incident
The primary clue for investigators lay in the nature of the cargo being transported: the hold contained over 1,700 barrels of pure ethanol. Subsequent inspections revealed that the contents of nine completely empty barrels were missing. Approximately 300 gallons of volatile alcohol had evaporated through the porous wooden staves, filling the sealed confines of the hold, whose hatches had been firmly secured due to stormy weather.
As the vessel sailed from the cold waters off New York into the warmer thermal zone near Portugal, evaporation accelerated dramatically. Given that the flash point of ethanol is only around 13 °C, an explosive gaseous mixture formed inside the hull, requiring only a minimal spark for detonation. Such a spark could have originated from friction between metal components or from a carelessly lit smoking pipe.
Experimental Validation and Catastrophe Reconstruction
For a long time, the alcohol theory faced criticism due to the absence of soot or fire damage on the wooden structures. However, subsequent scientific testing refuted these doubts:
The 2006 Experiment. Andrea Sella from University College London successfully replicated a similar explosion of butane vapor inside a cardboard mock-up for Channel 5. The ignition created a powerful shockwave and a fireball, yet the cardboard walls remained perfectly white and uncharred because a rush of cold air immediately followed the flame.
The 2026 Study. Scientists Jack Rowbotham and Frank Mayr from the University of Manchester conducted new tests on a 1:18 scale wooden model of the ship. Simulating the cold climate of New York produced no reaction to an electrical spark. However, after heating the model to temperatures typical of the Azores, a spark triggered a massive volumetric explosion. A ball of blue flame, reaching temperatures up to 2000 °C, erupted and vanished instantly without residual burning, resembling a culinary flambé effect.
Andrea Sella explained that the sudden appearance of a gigantic blue fireball and the intense thermal shock would have instilled immense terror in 19th-century sailors unfamiliar with advanced chemistry. Fearing a full-scale conflagration and further detonations, Captain Benjamin Briggs most likely ordered an immediate evacuation onto the lifeboat, which subsequently became lost at sea. Currently, this theory is accepted by the scientific community as the most coherent explanation for the tragedy.
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