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ultraviolet light

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Ultraviolet light is a kind of electromagnetic radiation from the sun that has a wavelength shorter than visible light, so we cannot see it. Though too much ultraviolet light is bad for us, we do need some to be healthy for helping the body use Vitamin D.
Exploringnature.org has more than 2,000 illustrated animals. Read about them, color them, label them, learn to draw them.