ⓘ Mysteries ..

52-hertz whale

The 52-hertz whale is an individual whale of unidentified species which calls at the very unusual frequency of 52 Hz. This pitch is a much higher frequency than that of the other whale species with migration patterns most closely resembling this whales – the blue whale or fin whale. It has been detected regularly in many locations since the late 1980s and appears to be the only individual emitting a whale call at this frequency. It has been described as the "worlds loneliest whale".

1808 mystery eruption

The 1808 mystery eruption was a large volcanic eruption conjectured to have taken place in late 1808, possibly in the southwest Pacific. A VEI-6 eruption, comparable to the 1883 eruption of Krakatoa, is suspected of having contributed to a period of global cooling that lasted for years, analogous to how the 1815 eruption of Mount Tambora led to the Year Without a Summer in 1816.

Antikythera mechanism

The Antikythera mechanism is an ancient hand powered Greek analogue computer which has also been described as the first example of such device used to predict astronomical positions and eclipses for calendar and astrological purposes decades in advance. It could also be used to track the four-year cycle of athletic games which was similar to an Olympiad, the cycle of the ancient Olympic Games. This artefact was retrieved from the sea in 1901, and identified on 17 May 1902 as containing a gear by archaeologist Valerios Stais, among wreckage retrieved from a shipwreck off the coast of the Gr ...

Apollonius of Tyana

Apollonius of Tyana, sometimes also called Apollonios of Tyana, was a Greek Neopythagorean philosopher from the town of Tyana in the Roman province of Cappadocia in Anatolia.

Disappearance of the Beaumont children

Jane Nartare Beaumont, Arnna Kathleen Beaumont and Grant Ellis Beaumont, collectively known as the Beaumont children, were three Australian siblings who disappeared from Glenelg Beach near Adelaide, South Australia on 26 January 1966 in a suspected abduction and murder. At the time of their disappearance they were aged nine, seven, and four years respectively. Police investigations revealed that, on the day of their disappearance, several witnesses had seen the children on and near Glenelg Beach in the company of a tall blond and thin-faced man with a sun-tanned complexion of thin to athle ...

Peter Bergmann case

The Peter Bergmann case is an unsolved mystery pertaining to the death of an unidentified man in County Sligo, Ireland. From 12 to 16 June 2009, a man using the alias "Peter Bergmann" visited the seaport town of Sligo in northwest Ireland. He used this alias to check into the Sligo City Hotel, where he stayed during the majority of his visit, and was described by the hotel staff and tenants as having a heavy German accent. The mans movements were captured on CCTV throughout the town; however, the details of his actions and intentions remain unknown. His interactions with other people were ...