petroglifs:

Reconsidering the “Mother Road” — Route 66 and its roots in the trails traveling west/southwest out of the ancient (c. 600-1400 CE) Native American city of Cahokia (across the Mississippi from St. Louis).  

http://books.google.com/books?id=JlEIbk4Ce94C&lpg=PA2&ots=-QCdAnYZRo&dq=dave%20edmunds%20route%2066%20cahokia&pg=PA2&output=embed

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malformalady:

Chernobyl’s legacy recorded in trees  — The change in wood colour in these Scots pine logs indicates the year of the accident.  Many of the trees show highly abnormal growth forms reflecting the effects of mutations and cell death resulting from radiation exposure

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