Study: Facial expressions evolved from optical needs

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Study: Facial expressions evolved from optical needs

Maslow’s pyramid describes human motivations from the most basic to the most advanced. But Maslow’s time-tested pyramid, first proposed in the 1940s, had begun to look a bit weathered and outdated
Why do we become saucer-eyed when afraid and taper our eyelids to slits when disgusted?These near-opposite facial expressions are rooted in emotional responses that exploit how our eyes gather and focus light to detect an unknown threat, viagra found a study by a Cornell neuroscientist.

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