Browse Conspiracy Theories

The grassy knoll second-shooter claim is the most prominent sub-theory of the JFK assassination conspiracy. It holds that a second gunman fired from the wooden fence atop the grassy knoll north of Elm Street in Dealey Plaza on 22 November 1963. Evidence for the claim rests primarily on acoustic analysis of a Dictabelt police-radio recording (the basis for the HSCA 1979 conclusion of probable conspiracy), some witness testimony, and a perceived head-movement in the Zapruder film. The acoustic evidence was subsequently rejected by a National Research Council panel and the FBI. No physical evidence — no second bullet, no shell casings, no blood-spatter consistent with a frontal shot — has been produced. The Warren Commission found no credible second-shooter evidence; the HSCA concluded probable conspiracy based on the acoustic evidence; the NRC and FBI rejected that acoustic evidence. The claim is unsubstantiated but not fully resolvable.

In November–December 2024, a wave of unidentified drone sightings over New Jersey and surrounding states generated significant media and political attention. NJ Governor Phil Murphy, FBI, FAA, and DHS acknowledged the sightings but offered no definitive explanation. Multiple theories circulated: foreign-adversary surveillance, US military testing, hobbyist drones, misidentified aircraft. The FBI and DHS investigation concluded that many sightings were explained by misidentified commercial aircraft, hobbyist drones, and stars/planets. The "foreign adversary surveillance" and "advanced military testing" framings remain unsubstantiated.

Marilyn Monroe died on August 4–5, 1962 at her Brentwood home. The Los Angeles County coroner ruled probable suicide by acute barbiturate poisoning. Persistent claims hold that she was murdered — by the CIA, FBI, or individuals connected to President Kennedy or Attorney General Robert Kennedy — to prevent her from disclosing sensitive information. The FBI surveillance file on Monroe is real. Multiple forensic re-examinations have not produced new evidence supporting the assassination claim, which remains unsubstantiated.

Claims that the US government or USGS is concealing evidence of an imminent Yellowstone supervolcano eruption that would devastate North America, or that seismic and geothermal data are being misrepresented to prevent public panic. The USGS Yellowstone Volcano Observatory (YVO) publishes its monitoring data in real time. The current probability of a large-scale Yellowstone eruption in any given year is approximately 1 in 730,000.

Claims that governments run hidden breakaway space fleets or off-world bases.

Claims that Australian Prime Minister Harold Holt was abducted, defected, or killed rather than drowning.

Claims that Coca-Cola intentionally launched New Coke to revive demand for classic Coke or switch sweeteners.