publication date: Saturday, June 25, 2022 (part of Summer 2022)

category: Science

clue: For almost 2000 years, this Greek mathematician's treatises have been the intersection between astronomy and astrology.

explanation: Ptolemy is primarily remembered for three main treatises, one on mathematics, one on astronomy that introduced a heliocentric model to ancient Greek science, and one on astrology that established the concept of the horoscope. more…

intended difficulty: medium

solved by: Russ Wilhelm, Steve West, LaVonne Lemler, Samir Mehta, Chris Lemler, and Richard Slominsky

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