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Observations

Observations

Opinion, arguments & analyses from guest experts and from the editors of Scientific American

HIV-related memory loss shares similarity with Alzheimer's

Many people living with HIV report having memory loss or other cognitive problems that can sound a lot like early-onset Alzheimer's disease. Unlike their senior counterparts, however, cognitively impaired people with HIV are often in their 40s and 50s—and the early decline can make it difficult to hold jobs and maintain personal lives...

December 7, 2009 — Katherine Harmon

Copenhagen climate conference kicks off

To be or not to be? That is the question. Will 192 world governments agree in the next two weeks on a framework to cut emissions of greenhouse gases and thereby combat climate change?

December 7, 2009 — David Biello

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Dwindling Supply. Increasing Demand.

Dwindling Supply. Increasing Demand.

Solving the Water Crisis