Drakensang Online is a free to play 3D action RPG game that features extraordinary 3D graphics and effects and heralds the next generation of free-to-play online browser games. With the ability to.
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Theories of Color Vision. 1  In 1802, Thomas Young proposed that all human vision occurred through the combination of sensitivity to red, green, and blue. This theory, modified by Hermann von Helmholtz in 1852, came to be known as the Young-Helmholtz or trichromatic (three-color) theory of color vision.