Not everyone who attends is a flat Earther, according to event founder.
David Hogg, a Florida student who has been critical of politicians, has been attacked personally by right-wing activists.
Researchers found that whether or not a person believes in conspiracy theories could account for up to a quarter of their attitude toward vaccines.
The video went viral on Thursday.
There is indeed evidence of an ancient ocean on Mars, but seashells and a sphinx? Not so much.
Five far-right conspiracy theories that made their way into the government's inner circles.
Hollow Earthers are the new Flat Earthers.
NASA already explained the "concretion" phenomenon when a similar image made the rounds in 2014.
“I KNOW this is #FakeNews," George Scarborough tweeted.
"Vegas is as phony as a three dollar bill or as Obama's birth certificate," Jones said.
Even Bernie Sanders is apparently to blame.
Social media has greatly widened the reach of conspiracy theorists, who have targeted national tragedies in the past
Here's what will happen when the world ends. Apparently.
"Please cease using Seth as a political football in predetermined partisan narratives,” the family said.
The yogurt company filed for defamation, claiming that Infowars spread false reports linking its Idaho factory with a sexual assault case.
Trump is rarely likened to previous presidents, but is often accused of being a long-dead performance artist.