When to see a doctor. See a doctor if you or a loved one has memory problems or other dementia symptoms. Some treatable medical conditions can cause dementia symptoms, so it's important to determine the underlying cause.
A brief history of tobacco. (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.
Tobacco was introduced to Europe by the Spanish, who had learned to smoke it from Native Americans. Despite some early criticism of drinking smoke, tobacco became popular among the middle classes in England. Much of the tobacco smoked in England was grown in the West Indies.