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.
Is Saturn giving birth to a new moon?
"Images taken by NASA’s Cassini spacecraft revealed the presence of a ‘bright, extended feature’ located at the edge of Saturn’s A ring. Dubbed ‘Peggy,’ this icy object could be the final moon of Saturn, say scientists."
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.”