Rough Guesses That We Measure Microscopically
When you watch a football game, you see officials watching the runners being tackled or run out of bounds. These officials then run out, grab the ball and place it on the field when they estimate it was advanced to. It is a field of 100 (US) or 110 (Canadian) yards, and the placement is… Read More: Rough Guesses That We Measure Microscopically »