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.
Incense smoke wafts from huge burners in Lhasa, Tibet. The first recorded use of incense was by the Egyptians during the Fifth Dynasty, 2345-2494 BC. Incense use in religious ritual was either further or simultaneously developed in China, and eventually transmitted to Korea, Japan, Vietnam and the Philippines.