Using light and ultrasound imaging technology, researchers have discovered how some frogs found in South and Central America have the rare ability to turn on and off their nearly transparent appearance.
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Scientists discover the secret power that makes glass frogs
Scientists reveal secrets of northern glass frogs' transparency - ABC News
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Scientists Discover the Reason Behind the Glass Frog's Translucent Skin, Smart News
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Scientists discover the secret power that makes glass frogs
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Glass act: Scientists reveal secrets of frog transparency - The San Diego Union-Tribune