Science, March 6, 2009

Cover
Gray and black wolf pups howling in Wolf Park in Battle Ground, Indiana. In North American gray wolves (Canis lupus),
a mutation that alters coat color from brownish-gray to black, which
derives from past hybridization with domestic dogs, is increasing in
forested habitats because of positive selection.

The Danger Within
The suicide of Army researcher
Bruce Ivins will inevitably mean changes in biosecurity policy, but
government and academic scientists are divided on how stringent the new
procedures should be.

Watching as Ants Go Marching -- and Deciding -- One by One
The "Ant Idea Man" challenges established views by using paint and radio tags to see each ant as an individual.

On the Origin of Photosynthesis
Where would we be without photosynthesis? In the third essay in Science's
series in honor of the Year of Darwin, Mitch Leslie details
researchers' efforts to piece together how and when organisms first
began to harness light's energy.

The Challenge of Finding a Cure for HIV Infection
This
review discusses our current understanding of suppressive
antiretroviral therapy, the latent viral reservoir, and the needs for
and challenges of attacking this reservoir to achieve a cure.

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