One of the (very many) problems with the Flat Earth "model" of reality is the midnight sun in Antarctica. The existence of these causes problems for the Flat Earth belief, but is entirely consistent with and expected with the true globe model of reality.

So far, flerfs have called all videos of the midnight sun fake. Therefore, Will Duffy has offered to send both flat and globe earthers there to see it with their very own eyes.

So far, two flat earth participants and eight globe earthers have agreed to go.

If at least one flat earther does end up going, this market will resolve to yes. If no flat earthers attend, this market will resolve to no.

Resolution source:
https://www.the-final-experiment.com/