Year: 2021

Nature

The autumnal equinox

Here in the northern hemisphere we recently experienced the autumnal equinox, which means we saw an equal 12 hours of day and night. It also marked the beginning of fall—at least according to astronomical seasons. Meteorological seasons are different. For

Math

Battling the 538 Riddler

Every Friday morning FiveThirtyEight posts a math challenge in their Riddler column. The May 21, 2021 problem featured “anti-isosceles” sets. I’ll let the Riddler himself explain in more detail:   But this week, Jordan is asking about what he calls

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