Link to actual paper, much more interesting than the article, lots of pictures! https://www.fpl.fs.fed.us/documnts/pdf2018/fpl_2018_song001.pdf#page1 https://ww

Link to actual paper, much more interesting than the article, lots of pictures! https://www.fpl.fs.fed.us/documnts/pdf2018/fpl_2018_song001.pdf#page1 https://www.fpl.fs.fed.us/documnts/pdf2018/fpl_2018_song001.... Prior discussion on HN: https://news.ycombinator.com/item?id=16331375 https://news.ycombinator.com/item?id=16331375