Fall equinox 2022: Not as 'equal' as you may think

Twice a year, the terminator that divides night from day on Earth is a straight north-south line. We call those the equinoxes.  (CNN/NASA images) Twice a year, the terminator that divides night from day on Earth is a straight north-south line. We call those the equinoxes. (CNN/NASA images)

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