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Transcript
Deep inside the Sun, fusion in the core forges energy, and those photons begin a long random walk through a radiative zone so dense that they can take about 170,000 years to leave it. NASA describes this as a random walk problem, because photons are scattered again and again before they ever reach the surface. Once sunlight escapes the photosphere, it races the distance to Earth in about eight minutes and twenty seconds. So the warmth on your skin is not just sunlight, but ancient light, born deep within the Sun long before human history.
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