Jean-Jacques d’Ortous de Mairan: Pioneer of Plant Circadian Rhythms

Jean-Jacques d'Ortous de Mairan (1678-1771), a notable French mathematician, astronomer, and geophysicist.

Chronobiology for the Circadian Clock Today is the birthday of Jean-Jacques d’Ortous de Mairan, who was born on this day in 1678.   Mairan was a French chronobiologist – a job one rarely hears about these days. In 1729, da Mairan put together an experiment showing the existence of a circadian rhythm in plants. Essentially, he…

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November 26, 2019 Herbal-Infused Broth, Leave the Leaves, Jean-Jacques d’Ortous de Mairan, Henry Winthrop Sargent, Oak by William Bryant Logan, a Thanksgiving Time Capsule and an Olive Tree on a Movie Set in 1949

The Daily Gardener Podcast Album Cover with a pot of rosemary - the herb for remembrance - beckoning gardeners to remember to listen to the show. Updated September 2025.

Subscribe Apple | Google | Spotify | Stitcher | iHeart Support The Daily Gardener Buy Me A Coffee  Connect for FREE! The Friday Newsletter |  Daily Gardener Community Curated News How To Make A DIY Herbal-Infused Broth | Herbal Academy @herbalacademyne @HeatherSaba  It’s just so easy to incorporate herbs into your everyday cooking. “An herbal-infused…

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