The evolution of the human eye – TED Ed


The evolution of the human eye – Joshua Harvey

The human eye is an amazing mechanism, able to detect anywhere from a few photons to a few quadrillion, or switch focus from the screen in front of you to the distant horizon in a third of a second. How did these complex structures evolve? Joshua Harvey details the 500 million year story of the human eye.

View full lesson: http://ed.ted.com/lessons/the-evoluti…

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