Flat Earther travels all the way to Antarctica to put his theory to the test - only to realise our planet is very much round

Ever since the time of the ancient Greeks over 2,000 years ago, human beings have known the Earth is a globe. 

Despite this, some people are still convinced that we live on a giant floating disc in space, known as 'Flat Earth'. 

Now, one of the internet's most famous 'Flat Earthers' has finally cottoned on to the truth. 

Jeran Campanella, who runs the popular Flat Earth YouTube show 'Jeransim', has travelled to Antarctica as part of a trip dubbed 'The Final Experiment'. 

Mr Campanella witnessed first hand that the sun doesn't set during the southern hemisphere's summer. 

This debunks the belief held by Flat Earthers that Antarctica is an ice wall where the sun rises and sets every day. 

Stationed in Antarctica, he says to the camera: 'Sometimes you are wrong in life and I thought there was no 24-hour sun. In fact I was pretty sure of it. And it's a fact – the sun does circle you in the south. So what does that mean? You guys are going to have to find that out for yourself.' 

Campanella thanked the organiser of the trip, which cost $35,000 (£27,500) – although he stopped short of saying that the Earth is spherical. 

Mr Campanella was featured in the 2018 documentary 'Behind the Curve' as he unintentionally debunked his own theory with a light experiment. 

A co-creator of the GlobeBusters YouTube channel, which has 73,000 subscribers, he describes himself as an 'open-minded True Earth' proponent and crypto enthusiast. 

His website Jeransim.com flogs everything from 'anti-NASA' t-shirts and beenies to crypto consultations, leaf powder medicinal capsules and private Zoom dinner parties.

When he agreed to travel to Antarctica on the proviso he wouldn't have to cover the trip costs, he expected the sun to rise and fall out of view from the horizon.   

But in the new clip, he bashfully admits to the truth and acknowledges people may see him as a 'shill' – a trickster who takes part in the supposed cover-up that the Earth is round. 

'I realise that I'll be called a shill for just saying that and you know what, if you're a shill for being honest so be it,' he said. 

'I honestly believed there was no 24-hour sun – I honestly now believe there is.' 

As any well-informed person will know, Antarctica is an island continent at the southernmost part of our planet.

Due to the tilt of the Earth, the sun does not set during the southern hemisphere's (or northern hemisphere's) summer – it just moves in a circle in the sky. 

It means the sun remains visible all day, including at midnight – a phenomenon dubbed 'the midnight sun'. 

But Flat Earthers, or 'Flerfs', believe that Antarctica is an ice wall that encircles all the other continents and holds in all the world's oceans. 

Therefore, they think the sun rises and sets each day, every day, regardless of whether it's summer or not.

To account for night and day, most theorists believe the sun moves in circles around the North Pole, with the sun's light acting like a spotlight over Earth. 

About three years ago, Will Duffy, a pastor from Colorado, was made aware that people still believe the Earth is flat when a friend of his posted about it on Facebook. 

Since Flat Earthers said for years that Antarctica will show the world the truth about the shape of the Earth, Mr Duffy decided the easiest solution would be to just go to Antarctica. 

'After we go to Antarctica, no one has to waste any more time debating the shape of the Earth,' he said. 

'I created The Final Experiment to end this debate, once and for all,' he said. 

On December 14, Mr Duffy flew with four Flat Earthers (including Mr Campanella) and four people who already know the Earth is round ('globe earthers') to Antarctica. 

Mr Duffy said he filmed the sun for 25 hours straight, using SpaceX's Starlink satellite internet network for a livestream.

Stunning footage from the frozen landscape shows the gleaming midnight sun with ice-peaked mountains in the background. 

'That is a midnight sun – so the sun has never set the entire time we've been here,' the pastor said to the camera. 

'I put sunscreen on at midnight so that I would not get burned at midnight while I was doing this livestream.' 

He passes over to Mr Campanella, who humbly admits he was wrong, having witnessed the sun travel in a circle above his head. 

However, another famous Flat Earther on the trip, Austin Witsit, has more trouble letting go of the theory. 

Witsit said there's 'clearly' a 24-hour sun, but denied that this proves the Earth is a globe. 

'I don't think it falsifies plane [flat] Earth, I don't think it proves a globe – I think it's a singular data point,' he said. 

Likewise, some YouTuber conspiracy theorists have been left unconvinced, with many claiming the group were standing in front of a green screen. 

In the live chat, YouTube user Nandy posted: 'THIS IS A GREEN SCREEN, HOLD UP SNOW AND PUT UP THREE FINGERS IF IT'S REAL, the earth will always be flat', while user Fozzy_Foster said: 'move the camera green screen.' 

Another user, Oz Riv, called Mr Duffy a 'shill', adding: 'You are a pastor advocating for earth that isn't biblical. Annd you work with Nasa.' 

Scientists have know for millennia that Earth is a sphere due to the simple fact that the sun sets at different times in different locations. 

If the Earth were flat, then shadows would be the same length, regardless of location.

For space travelers and robotic probes adorned with cameras, the curvature of the Earth has also long been clearly visible. 

It was Greek philosopher Pythagoras who first proposed that the Earth was round around 500 BC, but it was about 350 BC that Aristotle declared Earth was a sphere. 

This was based on observations Aristotle had made about which constellations you could see in the sky as you travelled further and further away from the equator.