Fossils are the nodes; dung are the arcs(nautil.us)
nautil.us
Fossils are the nodes; dung are the arcs
http://nautil.us/issue/7/waste/reading-the-book-of-life-in-prehistoric-dung
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http://nautil.us/issue/7/waste/reading-the-book-of-life-in-prehistoric-dung
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