However, some people who have early-onset Alzheimer's don't have mutations in these three genes. That suggests that this early-onset form of Alzheimer's disease is linked to other genetic mutations that haven't been identified yet.
Early history Cigars, cigarettes Cancer by the carton Legal history Surgeon General's warning. (CNN) -- Tobacco was first used by the peoples of the pre-Columbian Americas. Native Americans apparently cultivated the plant and smoked it in pipes for medicinal and ceremonial purposes.
Little is known about the ancient Greek writer Aesop (c. 620 B.C.E.âc. 560 B.C.E.), whose stories of clever animals and foolish humans are considered Western civilization's first morality tales. He was said to have been a slave who earned his freedom through his storytelling and went on to serve as advisor to a king.