“Euler calculated without apparent effort, as men breathe, or as eagles sustain themselves in the wind.” ~ François Arago

The only sound apparent was the silvery, creek-like trickle of the fish tank.

And of course the scratch of graphite on paper, the rubbery pass of the eraser, the occasional puff of breath clearing the work area, and the rapid tap of keyboard keys.

I began again.

0, 1, 1, 2, 3, 5, 8, 13, 21, 34…

Do you recognize this sequence of numbers?

Your eye knows and loves them well, even if your brain is drawing a blank.

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