TIERRA DEL FUEGO. WEATHER AND CLIMATE. In spite of its incendiary name, Tierra del Fuego -as well as the rest of Patagonia- has low temperatures and strong winds, sudden changes of weather, going from strong winds to complete calm, or from sunny to rainy conditions being very common.
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.
one of many ideas of the physiological premise of color vision based upon proof from experiments on color mixture wherein all colors and shades were capable of being matched by a mixture of three primary hues. The Young-Helmholtz theory of color vision is the most widely acknowledged trichromatic theory.