The doctor who dealt with pair said: "The funny thing is that they orient themselves with the compass...a principle that they, as flat-Earthers, should reject."
Sagan used an experiment conducted by the Greek mathematician and astronomer Eratosthenes.
The 64-year-old died after his homemade steam-powered rocket crash landed moments after takeoff near Barstow, California.
Hughes' rocket measures just over 20 feet in length and is powered by "superheated water."
Javi Poves challenged a Spanish science minister to a debate on the curvature of the Earth.
I went to a Flat Earth convention. Here's what separates science deniers from scientists.
Flat Earth believers debunk themselves in the shocking light experiment ending to "Behind the Curve," a 2018 documentary now streaming on Netflix.
Mars is round and NASA just landed another spacecraft on it.
Pac-Man holds the answer.
The daredevil is already planning his next launch—and a run for governor.
Neil deGrasse Tyson said so many people believe the Earth is flat now because the education system has failed.
Not everyone who attends is a flat Earther, according to event founder.
The internet's favorite flat-Earther is having trouble getting his rocket up—again.
If you aren't willing to accept the evidence Earth is round, what do you do with Mars, Jupiter and the rest?
Even the Ancient Greeks worked out that the Earth was round 2,000 years ago.
"Mad" Mike Hughes "doesn't believe in science," says that aerodynamics is "just a theory" and one day wants to be governor of California.