ibiza

My apologies if similar topics have already been discussed. I get buried in a sea of information when reading through the threads! I have been attempting to provide definitive proof to a friend that the Earth is indeed a spinning ball. Unfortunately, he will not accept any information provided...

SPOILER ALERT: This post is very boring, and mostly pointless: not even flat earthers use this 'proof', and Dubay seems to have gone somewhat out of fashion, but I include it here because: a) I did the research already; b) others debunking his list on their blogs hadn't quite figured this one...