How do animals see in the dark? - Anna Stöckl
View full lesson: http://ed.ted.com/lessons/how-do-animals-see-in-the-dark-anna-stockl To human eyes, the world at night is a formless canvas of grey. Many nocturnal animals, on the other...
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To human eyes, the world at night is a formless canvas of grey. Many nocturnal animals, on the other hand, experience a rich and varied world bursting with details, shapes, and colors. What is it, then, that separates moths from men? Moths and many other nocturnal animals see at night because their eyes are adapted to compensate for the lack of light. All eyes, whether nocturnal or not, depend on photoreceptors in the retina to detect light particles, known as photons. Photoreceptors then report information about these photons to other cells in the retina and brain. The brain sifts through that information and uses it to build up an image of the environment the eye perceives. The brighter the light is, the more photons hit the eye. On a sunny day, upwar...
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To human eyes, the world at night is a formless canvas of grey. Many nocturnal animals, on the other hand, experience a rich and varied world bursting with details, shapes, and colors. What is it, then, that separates moths from men? Moths and many other nocturnal animals see at night because their eyes are adapted to compensate for the lack of light. All eyes, whether nocturnal or not, depend on photoreceptors in the retina to detect light particles, known as photons. Photoreceptors then report information about these photons to other cells in the retina and brain. The brain sifts through that information and uses it to build up an image of the environment the eye perceives. The brighter the light is, the more photons hit the eye. On a sunny day, upwar...
