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.
By experimenting with growing and curing tobacco from seeds obtained from the Caribbean, John Rolfe developed the colony's first profitable export. Before 1611, Rolfe began cultivating tobacco seeds grown in the West Indies; he probably obtained them from Trinidad or some other Caribbean location.