the.com/constant
The one thing that never moves, in a universe that won't stop moving.
speed of light299,792,458 m/s, exact by definition since 1983
euler's numbere shows up uninvited in growth, decay, and interest
fine-structureroughly 1/137, and nobody knows why
piinfinite, non-repeating, yet utterly dependable
in codedeclared once, then yells if you change it