This story appears in the October 2012 issue of National Geographic magazine ... all perfectly capture the sun? The work of natural selection offers a key to the puzzle. Desert leaves tend ...

This story appears in the June 2017 issue of National Geographic magazine ... The famed ecosystems that taught the world about natural selection may teach us a lesson yet again, offering us ...

This story appears in the February 2009 issue of National Geographic magazine ... as it's now known—and that natural selection is the mechanism. He wrote a book called The Origin of Species ...