Leonardo da Vinci’s sketch of a tree illustrates the principle that combined thickness is preserved at different stages of ramification. The math that describes the branching pattern of trees in ...

Across cities and suburbs, a curious pattern keeps turning up in aerial photos and field surveys alike: trees that stand closest to cell towers are often the ones that look the sickest. Their crowns ...

Sign up for CNN’s Wonder Theory science newsletter. Explore the universe with news on fascinating discoveries, scientific advancements and more. Trees depicted in ...

There are some low branches from a few shade trees hanging over my front sidewalk and driveway that I would like to prune to increase the clearance for people and cars. Is it OK to prune some branches ...

Squirrels, insects and lightning strikes may be the reason for dead tree branches. Pruning the dead branch will solve the problem in most cases. This has been a long, hot, wet summer and soon fall ...

The photo is of a sycamore tree at Red-tail’s McVey Memorial Forest. A walk in the woods this time of year is different. It’s quiet and monochromatic. Other than the crunch of your shoes on frozen ...