Have you ever walked in the shade of a mighty oak tree? In late summer or fall, you may find an odd little brown woody ball attached to a fallen twig. Look up into the tree, and you may see more ...

What do the following items have in common: the Declaration of Independence, Da Vinci’s notebooks, Bach’s musical scores, Rembrandt’s drawings, Shakespeare’s plays, and the Magna Carta? Give up? These ...

Other oak species are also apparently appealing to gall-making insects (and arachnids like mites), and there’s no shortage of types of gall, some of which you may have heard called “oak apples.” Iron ...