Sierra Nevada Ecosystem Project Science Team and Special Consultants. Status of the Sierra Nevada. Wildland Resources Center Report No. 36. Centers for Water and Wildland Resources, University of California, Davis. International surveys indicate that most people feel moderately happy with their lives, while a new twin study suggests that life satisfaction may largely derive from an inherited tendency toward a positive attitude combined with fortune's favors.
Most people are happy.
Lykken, D., and A. Tellegen. Happiness is a stochastic phenomenon. Letter names help children to connect print and speech. Biology RNA challenges cancer. . . and viruses . . . Researchers are now testing whether RNA, a single-stranded nucleic acid similar to DNA, can be used as a drug to treat cancer, autoimmune disease, and infections.