Whether you’re walking along a city sidewalk or hiking deep in the forest, you might occasionally notice paint marks on tree trunks (or even a metal band once in a while). Those paint marks are codes ...

Several maple trees with white trunks - By Eve Livesey/Getty Images You may be lucky enough to live in or visit an area that has a variety of trees. What's perhaps even more surprising are the ...

Q: My dad helped me plant a couple of young apple trees in my backyard last weekend and so far, so good. After we finished I said the only thing I had left to do was paint the trunks white. He looked ...