All of our skin organs form from simple folds in skin tissue. Once this process was in place, it was modified to produce all kinds of skin organs — from a reptile’s scale to a bird’s feather to a mammal’s mammary glands.

Learn more tomorrow with Neil Shubin when Your Inner Fish continues tomorrow (4/16) on PBS at 10/9c.

Scientists Rank World’s Most ‘Evolutionarily Distinct’ Birds

Is a bird more worth saving from extinction if it is evolutionarily unique, as well as physically rare? That’s one challenging question raised by newly published research that factors together the distinct evolutionary history of the world’s bird species, with how healthy their population numbers and prospects for survival are in the present.”

Learn more from popscihttp://goo.gl/KUSqfu

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