With their hearts, guts and other internal organs visible through translucent skin, glass frogs look vulnerable. Now, scientists have found their embryos don't like staying defenseless, so they hatch more quickly when their fathers desert them.
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With their hearts, guts and other internal organs visible through translucent skin, glass frogs look vulnerable. Now, scientists have found their embryos don't like staying defenseless, so they hatch more quickly when their fathers desert them.