What are the 100 most revolutionary discoveries in Geography?

I submit that the 100 Most Revolutionary Discoveries in Geography are this set:  https://sway.com/jpFfkuBMVghB0f7T  Your reactions?  What would you have included? For more, see my book Interpreting Our World, https://www.amazon.com/Interpreting-Our-World-Discoveries-Revolutionized/dp/161069919X  here:  

Isn’t That Spatial? Teaching about the Environment, Examining Field Data, and Telling Your Environmental Story with Web Mapping Technology

I gave a presentation and workshop for the North American Association for Environmental Education (www.naaee.org) entitled “Isn’t That Spatial? Teaching about the Environment, Examining Field Data, and Telling Your Environmental Story […]