A common online conspiracy theory is the illuminati.
Conspiracy theories have always existed but the internet fuels them in new ways.
Funeral services took place for Benjamin Andrew Wheeler, one of the students killed in the Sandy Hook Elementary School shooting, while a hearse with another shooting victim drives by.
AP Photo/Julio Cortez
Family members of Sandy Hook victims sued media personality Alex Jones over his claims that the killings were a hoax they participated in. Current law makes their lawsuit unnecessarily hard to prove.
Would a flat Earth suffer from climate change?
Conspiracy theorists have an à la carte attitude to data and trust, so what can scientists do about it?
Fox Mulder (David Duchovny) in The X-Files is fond of joining seemingly unrelated dots to create a conspiracy theory – but in reality, the picture is more nuanced.
Conspiracy theorists are commonly seen as fundamentally irrational, with an all-encompassing obsession. But new research suggests they may have quite different motivations, beliefs and attitudes.
Proof of time travel, false memories or a parallel universe? A look at the wacky world of the 'Mandela Effect'.
A British Army soldier on lookout in the Falls Road area of Belfast in 1969.
PA/PA Archive/PA Images
Some journalists have claimed that 'thousands' of documents which have gone missing at the National Archives are proof of 'history theft'. It's probably just old-fashioned incompetence.
‘He said what?’
Dealing with a co-worker or manager who says demonstrably false things can be a challenge, particularly at holiday office parties. Here's a guide to handle a colleague in denial.
Easy experiments that show the Earth is round.
What was lost, other than a life, on Nov. 22, 1963?
In the minds of many, the assassination remains a tragedy cloaked in mystery. How does this lack of closure – and the general distrust it fomented – resonate in American culture and politics today?
Will the files show who was really behind the assassination of John F. Kennedy?
It's been a good year for conspiracy theorists, so they say.
Intuition is just one of many factors that shape what you believe.
The princess of Wales is pictured in Bonn, Germany in 1987.
AP Photo/Herman Knippertz
To succumb to conspiracy is to be human.
Oh please. There’s no wind on the moon.
Rational arguments and myth busting often won't help you change the mind of a conspiracy theorist. But there are other ways.
Edward Jenner, who pioneered vaccination, and two colleagues (right) seeing off three anti-vaccination opponents, with the dead lying at their feet (1808).
I Cruikshank/Wellcome Images/Wikimedia Commons
Some people have objected to childhood vaccination since it was introduced in the late 1700s. And their reasons sound remarkably familiar to those of anti-vaxxers today.
Erdogan and Trump getting theoretical.
They're not just about aliens and moon landings.
Officials check an electronic voting machine.
EPA/Raminder Pal Singh
Election results almost always come with conspiracy theories attached, but India's latest round of recriminations goes deeper than usual.
Activists form a red ribbon, the symbol of the worldwide campaign against AIDS in Russia, 2010.
In Russia, social networks have given a new life to the conspiracy theory that HIV-AIDS is a global hoax.
Gurneys to remove bodies from the Heaven’s Gate cult house in San Diego, California, March 27, 1997.
Twenty years ago, the paranoia that consumed cults like Heaven's Gate existed on the margins of American society. Now it's moved toward the center of the nation's political life.
This man needs to trust you before listening to your public health message. No wonder bombarding him with facts doesn’t always work.
Reassuring people "not to worry" about public health issues like vaccination or fluoridated water doesn't work. Nor does telling people "don't panic". So, what does?
Dramatic. But also fictitious, like The Sun’s article.
The reporting of crackpot theories as news by mainstream news outlets only damages the credibility of the media and science, and undermines public trust in both.