Archive index
Investigations
Browse all dossiers in the archive. Each investigation compiles documented facts, supporting and contradicting evidence, open questions, and source references.
13 DOSSIERS
DB Cooper
The 1971 hijacking of a Northwest Orient flight by a man calling himself D.B. Cooper, who parachuted from the plane with $200,000 and was never found.
Dyatlov Pass Incident
The 1959 mysterious deaths of nine Soviet hikers in the Ural Mountains, whose tent was found cut open from the inside and bodies showed unusual injuries.
Tunguska Event
A massive explosion on June 30, 1908, near the Tunguska River in Siberia that flattened 2,000 square kilometers of forest, whose cause remains debated.
Oak Island Mystery
Stories of buried treasure and mysterious artifacts on Oak Island, Nova Scotia, drawing treasure hunters for over 200 years.
Roanoke Colony
The 1587 English settlement on Roanoke Island that vanished, leaving only the word 'CROATOAN' carved into a post.
Voynich Manuscript
An illustrated codex from the early 15th century written in an unknown script and language that has defied all attempts at decipherment.
Tamam Shud
A 1948 unidentified man found dead on Somerton Beach in Adelaide, Australia, with a cryptic 'Tamam Shud' note and an unlisted phone number.
Mary Celeste
An 1872 merchant ship found abandoned and adrift in the Atlantic with no explanation for the crew's disappearance.
Sodder Children
The 1945 disappearance of five of ten Sodder children in a house fire in West Virginia, with evidence suggesting they may have been abducted.
Flannan Isles Mystery
The 1900 disappearance of three lighthouse keepers from the Flannan Isles in Scotland with no explanation.
Dancing Plague
A 1518 phenomenon in Strasbourg where hundreds of people danced uncontrollably for days, with some dying from exhaustion.
Green Children of Woolpit
A 12th-century account of two green-skinned children who appeared in Woolpit, England, speaking an unknown language and claiming to come from a land called St. Martin's Land.
Lead Masks Case
A 1966 mystery in Brazil where two men were found dead wearing lead masks with no clear cause of death or explanation.