Send the following on WhatsApp
Continue to ChatPicking fights with a flat-earther https://www.urban-astronomer.com/astronomy/bad-science-ufos-and-modern-myths/picking-fights-flat-earther/
Picking fights with a flat-earther https://www.urban-astronomer.com/astronomy/bad-science-ufos-and-modern-myths/picking-fights-flat-earther/