For years, my father kept a slip of paper in his wallet, torn from a small 3 x 5 spiral notebook. On it, strangely, was a simple geometric sketch and a calculation of how far a 6-foot person could see before the horizon drops off due to the curvature of the earth. This is a curious thing to keep in one’s wallet. Backstory My dad and my older brother (a teenager at the time) made this calculation...
January 4, 2019
My Father Knew He was Fallible