On a flat earth, two parallel lines meet on the horizon …
And on a spherical Earth?
So I went on a cruise to check …
Original video in French : https://www.youtube.com/watch?v=mx9VtfURxTs
David K. Lynch’s article : “Turbulent ship wakes: further evidence that the Earth is round”, Applied Optics, 2005 : http://www.thulescientific.com/TurbulentShipWakes_Lynch_AO_2005.pdf
Music : Ender Guney, Railway : https://www.youtube.com/watch?v=sm95mYuRYuI