Shakespeare embedded an equation into The Sonnets numbering system that proves he was aware of the Speed of Light and other astronomical values such as the average distances between Earth, Moon and Sun, revealed using all three major measuring systems: Imperial (miles), Metric (kilometers), and Biblical (royal cubits).
The mystery lies not only in his astounding level of accuracy but in the ingenious method of conveying his knowledge by co-ordinating the relevant words (Light, Speed, Earth, Moon, Sun, Distance) with the sonnet numbers in which those words appear. It’s an achievement so astonishing it has to be seen to be believed.