Some people are born with naturally translucent or porcelain skin. This means that the skin is very pale or see-through. You may be able to see blue or purple veins through the skin. In others, ...
The glass frog's translucent stomach skin offers a window into its internal organs. New research finds this odd seeming trait may help the frogs evade predators. Jorge GarcÍa / VW Pics / Universal ...
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