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In Chapter 9, "We Were Hunted, Which is Why All of Us are Afraid Some of the Time and Some of Us are Afraid All of the Time," author Rob Dunn explains how predators shaped our evolution as we cowered and ran from their ravenous maws.

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image: The Anatomy of a High

The Anatomy of a High

By Thomas Kosten | June 3, 2011

When someone snorts or smokes cocaine, which is composed of small crystalline alkaloid molecules, the drug enters the bloodstream and from there eventually crosses into the heart, brain, and other organs. 

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image: Part Human, Part HIV

Part Human, Part HIV

By Gene M. Shearer and Adriano Boasso | June 3, 2011

Like other enveloped viruses, HIV exits its host cell enshrouded in the cell’s membrane, which contains membrane molecules such as the human leukocyte antigens (HLA). 

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image: The essence of stem cells

The essence of stem cells

By Cristina Luiggi | June 3, 2011

Researchers discover a protein that may allow already-differentiated somatic cells to become stem cells.

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image: Dominique Bergmann: Probing Plant Pores

Dominique Bergmann: Probing Plant Pores

By Jef Akst | June 3, 2011

Assistant Professor, Department of Biology, Stanford University. Age: 41

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image: What lab mice are made of

What lab mice are made of

By Megan Scudellari | June 2, 2011

The most detailed genetic maps to date of classical lab mouse strains reveal limited genetic diversity and overwhelmingly originate from a single species of domestic mouse, the researchers report.

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image: The Gravity of Life

The Gravity of Life

By Rob Dunn | June 1, 2011

Whose well-being is threatened by our changing relationship with the myriad organisms that shaped the evolution of our species?

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Vaccines

By Robin A. Weiss and Peter Hale | June 1, 2011

Looking back, looking ahead

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image: The Last Vaccine Frontier

The Last Vaccine Frontier

By Brad Spellberg | June 1, 2011

Successful vaccines have been created to protect against pathogenic bacteria and viruses. Why aren’t there any for combating fungal infections?

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image: Recognizing the Human Potential

Recognizing the Human Potential

By Gene M. Shearer and Adriano Boasso | June 1, 2011

It may be time to reconsider an AIDS vaccine which is more human than viral, triggering the immune system in a way that no other vaccine does.

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