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Still Waters

Snakes control blood flow in 'spectacles'

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Snakes can control blood flow in their "spectacles", scientists have found.

The animals are known for their lack of eyelids, and instead have a transparent scale covering their eyes for protection.

These "spectacles" contain blood vessels, and researchers investigated how this arrangement does not obscure vision.

http://www.bbc.co.uk/nature/24725971

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Nature never ceases to amaze me.

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