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image: Falling Out of the Family Tree

Falling Out of the Family Tree

By | March 1, 2015

A mutation in an ethanol-metabolizing enzyme arose around the time that arboreal primates shifted to a more terrestrial lifestyle, perhaps as an adaptation to eating fermented fruit.

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image: Centennial <em>Shigella</em>

Centennial Shigella

By | February 1, 2015

A strain of the dysentery-causing bacterium isolated in 1915 tells the story of a young soldier who died of the disease in the early days of World War I.

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image: Seal Stowaways

Seal Stowaways

By | November 1, 2014

Pathogen traces recovered from Peruvian mummies suggest tuberculosis-causing bacteria rode from Africa to South America in pinnipeds.

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image: Predator Demoted

Predator Demoted

By | October 1, 2014

Extinct, giant arthropods, long assumed to be top predators of ancient seas, didn’t have sharp enough eyesight to be refined hunters.

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image: Chagas Watchdogs

Chagas Watchdogs

By | September 1, 2014

Can screening dogs for Trypanosoma cruzi antibodies inform public health officials about the risk of Chagas disease to people?

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image: Seeds of Hopelessness

Seeds of Hopelessness

By | August 1, 2014

Can seed banks adequately prepare for the future if wild plant populations are already lagging behind in adapting to rapid climate change?

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image: Self-Improvement Through the Ages

Self-Improvement Through the Ages

By | February 1, 2014

A 50,000-generation-long experiment shows that bacteria keep getting fitter.

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image: The Ultimate Wingman

The Ultimate Wingman

By | November 1, 2013

Differential gene expression between dominant and subordinate male turkeys could help evolutionary biologists deconstruct the roots of sexual dimorphism.

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image: Trouble in the Heartland

Trouble in the Heartland

By | October 1, 2013

A new tick-borne disease has emerged in the US Midwest—and the culprit is not a bacterium. 

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image: Viral in Valencia

Viral in Valencia

By | October 1, 2013

A genetic analysis that tracks the evolution of pathogens helped incriminate a Spanish anesthetist who infected hundreds of patients with hepatitis C.

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