Imgur user GregPagel’s snapped a photo of Lake Michigan, instantly raising doubts about everything he knew about the Earth globe. “I’ve often looked at the horizon over that lake–thousands of times–and wondered, “am I seeing a curve? I’m not sure. Maybe a little? Or is my mind playing tricks?”
So he did what any other person would do, and he used science to find out the curve.
“When I actually did the math and made the diagram, I actually felt a rush,” Pagel recalled.
Scroll down to see what he discovered for yourself!