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#1
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Sleep Stranger
Eyes were thought to have developed about 550 million years ago as photoreceptors on primitive single-celled creatures. Your eyes began to develop about two weeks after conception
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Top 5 Facts About The Doomsday Clock
#3
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Sleep Stranger
One human eye contains about 2 million individual working components. About a million nerve fibres connect each eye to the brain and cannot be artificially reconstructed with our current technology
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#4
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Sleep Stranger
The human eye can distinguish about 10 million different colours. Some women have a genetic mutation that may allow them to distinguish several million more
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#5
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Sleep Stranger
Your corneas are the only tissues in your body that do not have blood
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#8
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Sleep Stranger
A human fingerprint has around 40 unique characteristics whereas the iris of human eye has around 256
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#9
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Sleep Stranger
Night vision displays green because the human eye can differentiate more shades of green than any other colour
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#10
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Sleep Stranger
Humans and dogs are the only animals known to seek visual cues from another's eyes, and dogs only do this when interacting with humans
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