Browse Conspiracy Theories

Göbekli Tepe is a genuine 11,600-year-old megalithic site in southeastern Turkey that pushed monumental architecture back to Stone Age hunter-gatherers. Popular writers, above all Graham Hancock, recast it as proof of a lost technologically advanced civilization, a claim mainstream archaeology does not support.

Robert Temple's 1976 book The Sirius Mystery claimed the Dogon people of Mali held impossible ancient knowledge of Sirius B, an invisible white-dwarf companion star with a ~50-year orbit, taught to them by amphibious extraterrestrials called the Nommo. The claim rests on 1930s-40s ethnography by Marcel Griaule and Germaine Dieterlen. But a 1991 field restudy by anthropologist Walter van Beek found Dogon informants did not actually hold the Sirius-B lore Griaule reported, Sirius B's existence and orbital period were already well known to Western science before Griaule arrived, and Carl Sagan and others argue the knowledge, if genuine, reached the Dogon through ordinary human contact.

A set of clay jars with copper cylinders and iron rods, found near Baghdad and dated to the Parthian or Sasanian era, are claimed by alternative-history writers to be ancient electric batteries — proof of a lost electrical technology used for electroplating, or even a gift from ancient astronauts. The jars are genuinely old and a jar-plus-two-metals arrangement really can produce a fraction of a volt, and replicas (including a famous MythBusters build) have generated current. But there are no wires, no connectors, no electroplated artifacts, and no textual record of electricity in antiquity. The mainstream archaeological reading — storage vessels for sacred scrolls or protective spells — fits the evidence far better.

On 24 November 1971, a man using the alias "Dan Cooper" hijacked Northwest Orient Flight 305, extorted $200,000 in ransom, and parachuted from the aircraft over the Washington-Oregon wilderness, never to be identified. The FBI investigated more than 1,000 suspects over 45 years before formally suspending the investigation in 2016. In 2011, a citizen-science analysis of a partial ransom-bill find and particles on Cooper's abandoned tie produced new leads that also proved inconclusive.

The September 19-20, 1961 claim by Betty and Barney Hill (New Hampshire couple) of being abducted by extraterrestrials during a drive from Canada. The first widely-publicized modern alien abduction account; subsequent cultural template for many later reports.

The ancient Library of Alexandria — among history's most famous libraries — has been claimed to have been destroyed variously by Julius Caesar (48 BC), Theophilus of Alexandria (391 AD), Amr ibn al-As during Arab conquest (642 AD), or to have declined gradually. Each attribution carries cultural and political weight.

The biblical Ark of the Covenant — a gold-covered wooden chest described in Exodus containing the Ten Commandments — has been claimed to be located variously in Ethiopia (Axum), the Vatican, beneath the Temple Mount, or hidden by the Knights Templar.

On March 13, 1997, thousands of Arizonans witnessed lights moving in formation over Phoenix, Nevada, and northern Mexico. Claims include alien craft, experimental aircraft, and (the USAF's partial explanation) military flares dropped during training.

The December 26-28, 1980 incidents near RAF Woodbridge (a US-operated base in Suffolk, England) when USAF personnel reported unusual lights and an "illuminated triangular craft" in the adjacent Rendlesham Forest.

The theory that the classified US Air Force facility known as Area 51 in Nevada houses recovered extraterrestrial spacecraft and alien remains, and that the government has been reverse-engineering alien technology for decades.

The theory that an advanced ancient civilization, described by Plato as Atlantis, actually existed and was destroyed by a catastrophe, with its knowledge suppressed or lost to history.