Larger leaves favor photosynthetic production of a sugar-rich fluid to nourish the tree, but if the tree is too tall, the nutrient flow is slowed. Why are the leaves on the tallest trees all about the ...

The historic tree is alive, but it lost some of the record height that made it the tallest Douglas fir in the world. Volunteer tree climbers Damien Carré with Oregon Tree Care in Oregon City and Logan ...