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Rooftop rainwater could break cities’ air conditioning trap

Rooftop rainwater harvesting system on an urban building used for evaporative cooling during summer heatwaves

August 18, 2026 in Climate Action

BY THE OPTIMIST DAILY EDITORIAL TEAM Air conditioning is making cities hotter, and that’s not incidental. It’s the physics. Every AC unit pulls heat ...Read More

Beard dandruff remedies dermatologists swear by

Close-up of a man's beard with visible skin flaking, illustrating common beard dandruff symptoms

August 17, 2026 in Evergreen

BY THE OPTIMIST DAILY EDITORIAL TEAM If you’ve put real time into growing and grooming your beard, discovering a film of flakes underneath it ...Read More

Rainforest biodiversity rebounds within a single generation

Dense secondary rainforest regenerating after agricultural land is abandoned

August 17, 2026 in Climate Action

BY THE OPTIMIST DAILY EDITORIAL TEAM Cleared tropical rainforests can recover 90 percent of their species diversity within a single human generation, according to ...Read More

Podcast Transcript August 14th, 2026— Taking our own advice on slowing down this summer

August 14, 2026 in Miscellaneous

Episode Description: Arielle checks in solo to explain why the Kristy guest episode is getting a little more time. Both she and Karissa have ...Read More

Your Neanderthal genes may be building your muscles

August 14, 2026 in Evergreen

BY THE OPTIMIST DAILY EDITORIAL TEAM People who carry a Neanderthal version of the growth hormone receptor have, on average, 271 additional grams of ...Read More