Readers share photos of gray bird species that live across America. Learn about the variety of gray colored birds you should ...

All tree leaves have an outer layer called the epidermis, which can also be used in the identification process. This leaf "skin" always has a waxy cover called the cuticle and varies in thickness.

Here is a step-by-step guide for growing a peach tree from seed, from seed selection, preparation, and cold treatment to ...