Tiny red lights know as LEDs revolutionized the calculator in the 1960s and '70s, creating a boxy digital display of numbers that became a hallmark of the early hand-held adding machines.
In a fitting coincidence that brings mathematics full circle, the same type of tiny lights have begun illuminating the Great Dome at the Massachusetts Institute of Technology in a white, energy-efficient glow.
Let's hope Boston doesn't freak out over THESE LED lights. Remember this?
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