Flip through some of the most compelling National Geographic covers from the last 50 years. See every issue since 1888 cover-to-cover with Nat Geo PLUS, subscribing members’ all-access pass to ...

This story appears in the December 2012 issue of National Geographic magazine ... It doesn’t need to locomote, and it fortifies its structure by continually adding more wood.

This story appears in the June 2011 issue of National Geographic magazine ... the "mutable tissue" in its normally limp body to transform itself into a structure as solid as bone.

This story appears in the May 2013 issue of National Geographic ... “Its proximity to, but isolation from, the continental patterns of Asia and North America created a unique natural structure.

This story appears in the July 2016 issue of National Geographic magazine ... The longer curly hair grows, the more complex its structure can be, says a study reported in a journal of the American ...