Football’s Yellow Line Is an All-Time Great Invention - The Atlantic

Twenty-six years after the yellow line delivered augmented reality to the masses, it looks basically the same now as it did then. Many broadcasts have added the line of scrimmage in blue, or a line indicating the edge of field-goal range in green, but the yellow line remains. If anything, football has become nearly unthinkable without it. Goebert has heard of fans showing up to their first in-person football game and discovering, to their surprise, that the yellow line isn’t real.

Football’s Yellow Line Is an All-Time Great Invention - The Atlantic