2026/7/1 · 10:42
Why Is the Sky Blue?
A 60-second explainer on how sunlight, air molecules, and human vision make the daytime sky look blue and sunsets glow red.
A quick visual answer to a classic sky question: sunlight is a mix of colors, but the tiny gas molecules in Earth's atmosphere scatter short blue waves more strongly than longer red waves. The episode also explains why we see blue instead of violet, and why sunsets swing toward red and gold.
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