It is an interesting triple "coincidence, " which probably evolved over time, that our eyes are most sensitive to yellow-green light, which happens to be the characteristic color of sunlight as well as the color that can most easily be transmitted through the Earth's atmosphere.

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The Magellan eXplorist 510 Marine Edition provides boaters with a custom selection of best-in-class Navionics marine navigation charts and data plus a rugged, waterproof handheld Magellan eXplorist 510 Outdoor GPS device featuring easy-to-use menus, a built-in camera and a 3-inch sunlight-readable color touchscreen.

ENGADGET: Magellan eXplorist 510 Marine Edition sets sights on boaters, out in time for Talk Like a Pirate Day

The display self-adjusts to become an ultra-high contrast e-book reader in bright sunlight, and a bright full-color backlit display in normal light.

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The salt itself, up close, was the color of unbleached sugar, but the sunlight used it as if it were the brightest white.

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The most compelling remains Pixel Qi -- a hybrid LCD technology that can be switched from a standard, full-color LCD backlit mode to a Kindle-like monochromatic reflective mode viewable in direct sunlight (while consuming 80% less power than standard LCDs).

ENGADGET: The e-Reader story of CES 2010