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Previously, experts have always argued about the exact time when ancient species developed the first primitive ability to see light.

The skin of species in the animal world is very diverse in shape, size, even different flavors. Some animals have a very special skin, 1-0-2 in the world, giving their owners

Scientists from the Stanford University's Bio-X division have used gene therapy to manipulate mice, so light can be used on the legs of mice to alter the sensitivity of the pain.