The Final Experiment

The Final Experiment is an endeavor created by Will Duffy to end the debate by bringing flat earthers and globers together to collaborate on a single experiment with an agreed-upon interpretation.

Description from the website FAQ:

The Final Experiment is a way to settle the shape of the Earth debate. Both the flat earth side and the globe side agree that whether or not there is a 24-hour sun in Antarctica will confirm if we live on a flat plane or on a globe. A 24-hour sun cannot work on a flat plane in the south. And the sun cannot set on a globe during the southern summer.

They are traveling to Antarctica near the December solstice in 2024, to observe the 24-hour sun. The trip currently has three flat earthers and five globers set to go.