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Opening Remarks
The wavelength and energy are inversely proportional
Mechanism for Melanin Synthesis
Benefits of Vitamin D
Can you make vitamin D in winter?
Beta-endorphin levels
Can the skin perceive bright light?
UVA and Nitric Oxide
Sunlight and Breast Cancer
There is no downside to obtaining sensible sun exposure
How old sunlight is
Why is sunlight so old?
Photons are byproducts of powerful nuclear reactions
What are gamma rays?
What is a random walk?
Photons pinball light journey
The average distance between protons in the Sun
How long it takes for a photon to random walk from the Sun's core to space
Is sunlight old?
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