After the link not working and control F not turning up a 'earth-curvature' link on the page, I physically scanned down until I found this near the bottom:
Has some simple experiments to do that they claim will prove the earth is a ball. Haven't tried any, but the sunset twice method sounds like it has possibilities.
This is not found, and the link including it fails. The site itself is up, but that specific element has been removed or broken.
Works for me. Just google “earth curvature calculator” there’s more of them
After the link not working and control F not turning up a 'earth-curvature' link on the page, I physically scanned down until I found this near the bottom:
https://www.omnicalculator.com/physics/flat-vs-round-earth
Has some simple experiments to do that they claim will prove the earth is a ball. Haven't tried any, but the sunset twice method sounds like it has possibilities.