Despite the overwhelming scientific evidence that Earth is a spherical planet, supporters of the “flat Earth” theory are still trying to prove that we’ve all been lied to for centuries, and they’re coming up with craziest ways to do it. The last such attempt – taking a spirit level on a plane.

Flat Earth conspiracy theorist and YouTuber D. Marble recently went viral for his ingenious and hilarious attempt to prove beyond the shadow of a doubt that Earth is indeed a pancake, not a globe. He actually took a spirit level – the kind used in construction – on a flight from North Carolina to Seattle in order to “monitor whether or not the pilot would dip the nose of the plane to compensate for curvature”. The self-professed realist filmed himself placing a spirit level on his plane seat arm rest to see if the bubble would move as the pilot tipped the nose of the plane to compensate for the planet’s curvature. Only the bubble never moved…

“We’ve been living a lie all this time and the planet is actually completely flat,’ D. Marble says in his video. “This is a new experiment for the scientific community. Grab a spirit level and take it on the plane with you. If we’re living on a spinning ball or globe, according to curvature maths, the plane should be constantly dipping its nose forwards.”

“I recorded a 23 minute and 45 seconds time-lapse, which by those measurements means the plane traveled a little over 203 miles. According to curvature math given to explain the globe model, this should have resulted in the compensation of 5 miles of curvature. As you’ll see there was no measurable compensation for curvature,” he adds.

The video was originally shot in April and has been doing the rounds on flat-earther websites and forums, but it only went viral on twitter last week. Reactions to D. Marble’s “proof” that the earth is flat ranged from skeptical to hilarious.

“Remarkable how the plane stayed completely 100% level during take-off and landing, I’m beginning to question whether air travel exists,” Brian Levinson wrote.

“You think he would have looked out the window at the curve in the horizon like at least one time,” said Matty Young.

“This is like the perfect combination brilliant and stupid,” one Twitter user commented.

As funny as this may seem to most people, the fact remains that the numbers of flat-earthers is on the rise. Some of them believe that gravity is only a theory and that our “flat Earth” is surrounded by a heavily policed ice wall that keeps everything from spilling over…