This summer's record temperatures may be one of the signs that the earth's atmosphere is warming up. NOVA looks at the climate predictions and hazard warnings for the next century, based on the effects of our soaring consumption of fossil fuels.

In a culture laced with alcohol, the search for a scientific understanding of alcoholism is as complex as the disease. In an interdisciplinary report, NOVA looks at the many faces of alcoholism—medical, historical and social.