On the equinoxes, the sun illuminates everywhere on earth for 12 hours. Its "spotlight" covers exactly 50% of the earth.
Which scientist studied the earth from every point on its surface on this day to prove this?
Why would you require proof, especially from a single scientist's study? Did you hold Rowbotham to the same level of evidence?
I expected that RE'ers had some level of evidence behind their facts. Published studies, that sort of thing.
I assume Google searches work for you.
From Wikipedia article on Equinox:
References
1 United States Naval Observatory (2010-06-10). "Earth's Seasons: Equinoxes, Solstices, Perihelion, and Aphelion, 2000-2020".
2 Owens, Steve (20 March 2010). "Equinox, Equilux, and Twilight Times". Dark Sky Diary (blog). Retrieved 31 December 2010.
3 Montenbruck, Oliver; Pfleger, Thomas. Astronomy on the Personal Computer. Springer-Verlag. p. 17. ISBN 0-387-57700-9.
4 Meeus; Mathematical Astronomical Morsels; ISBN 0-943396-51-4
5 PIA11667: The Rite of Spring". Jet Propulsion Laboratory, California Institute of Technology. Retrieved 21 March 2014.