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Submission + - The Technology Behind Footballs' Magical Line (

adosch writes: The latest lockout antics are ancient history, preseason brawls are over and America's number one sport is back in action. Football uses a lot of interesting technology that we take for granted, and in this article I'll answer the question, how the heck do they get that yellow first-down line on the field?

"I've finally learned what `upward compatible' means. It means we get to keep all our old mistakes." -- Dennie van Tassel