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.

One man and his family have dominated Thailand's politics since the millennium. Billionaire Thaksin Shinawatra and his ...

Photos from the unveiling of the historical marker. In 1911, John Jordan, a 19-year-old African American, was lynched by a ...