If anyone should know something about the Earth's true shape, it's Neil deGrasse Tyson.
The famous astrophysicist and director of the Hayden Planetarium at the American Museum of Natural History in New York has made his career on knowing a thing or two about planets - namely, that ours is obviously round.
Now Tyson has taken to Twitter to drive that fact home to doubters out there, cheekily sharing an image that flat Earthers are never likely to see:
Tyson's tweet shows a picture of a lunar eclipse with a distinctly flat-looking shadow floating over the surface of the moon.
Of course, a lunar eclipse that looks like this is totally impossible due to the simple fact that the Earth is fucking round.
The image has done the rounds online many times over the years, but it still drives Tyson's point home brilliantly.
It's easy to see why a man who is having his whole life's work cast in doubt by a few tin-foil hatters is starting to lose his patience.
The 'Flat Earth' theory - which suggests that the Earth is not round but (you guessed it) flat - has been debunked for centuries and yet still stubbornly persists to this day.
People who believe the Earth is flat have seen a resurgence in recent years, which just goes to show that you should probably be a bit more sceptical about what people say over the Internet.
Last week we reported how the amateur scientist 'Mad' Mike Hughes planned to launch himself into the skies in a homemade rocket in an attempt to prove the flat Earth theory right.
Hilariously for us, Hughes' expedition was cancelled at the last minute when federal authorities contacted him to refuse permission for his launch.
Even if authorities had given him the okay, Hughes claimed that he wouldn't have been able to conduct his experiment anyway as his vehicle broke down in the driveway - unsurprising considering he cobbled it together out of spare parts in his garage.
While Hughes' project may have been temporarily grounded for now, the Flat Earth theory is likely to run irritatingly on.
At least we have experts like Neil deGrasse Tyson to set the record straight.
Featured Image Credit: PA Images