The number of minutes of daylight is increasing at its maximum rate today. Happy max derivative day, everybody!
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Why are there four seasons in a year? Because daylight follows an approximate sine wave, and it and its derivative have 4 maxima and minima.
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Replying to @stevenstrogatz
Nice.
And what of its other critical points (i.e. inflection)?1 reply 0 retweets 0 likes
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