A free data visualization — play it in your browser, no install. A bioluminescent forest of five city trees, shaped and lit by today's real sunrise and sunset data.
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Controls: Click or tap a tree to see its city's day length, sunrise, solar noon and…
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Open the live demo Source on GitHubFive cities, grown as glowing trees.
Each tree's height comes from how much daylight that city gets today, and it glows while the sun is up there.
Live capture, 22 October 2026, evening in California. Real sunlight data; the stamp bottom-left reads live.
San Francisco, Tokyo, London, Sydney and Dubai each get one tree. On load the page asks the Sunrise-Sunset API for today's sunrise, sunset, solar noon and day length at each city, and draws the trees from those numbers alone: no random values.
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