We all know that 42 is the answer to life, the universe, and everything, thanks to The Hitchhiker's Guide to the Galaxy. Now, we also know that it's the sum of three cubes.

For decades, scientists have wondered whether each of the numbers from 0 to 100 could be represented as the sum of three cubes, where a cube is the same number multiplied together three times (two cubed equals eight). Forty-two was the last number without a proven solution—until now.

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