The document discusses several topics related to aging, death, and dying: 1) Life expectancy in the US has increased dramatically over the past century to an average of 77.6 years, and women tend to outlive men by about 5 years. 2) Common biological theories of aging include the cellular clock theory, free radical theory, and hormonal stress theory which attempt to explain the aging process on a cellular level. 3) As people age, sensory abilities and physical health often decline as seen in conditions like vision loss, hearing loss, arthritis, and increased risk of diseases like Alzheimer's and Parkinson's. 4) Psychological theories of aging focus on maintaining independence and cognitive abilities through activities, social