Coffee is a brewed drink prepared from roasted coffee beans, which are hte seeds of berries from the Coffea plant. The genus Coffea is native to tropical Africa, Madagascar, the Comoros, Mauritius and Réunion in the Indian Ocean. The two most commonly grown varieties are the highly regarded Arabica, and the stronger, hardier Robusta.
Coffee seeds were first exported from East Africa to Yemen, as the Coffea Arabica plant is thought to have been indigenous to the former. Yemeni traders took coffee back to their homeland and began to cultivate the seed. By the 16th century, coffee had reached Persia, Turkey, and North Africa. From there, it spread to Europe and the rest of the world.