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Genes & Cells

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sparrow

ABOUT THAT LIGHT Another reason for caution in lighting up the night comes from a study of house sparrow difficulties in fighting off West Nile virus, which mosquitoes biting the birds can then spread to people.

Southeast Asian hunter-gatherers

SCENT MASTERS  Southeast Asian hunter-gatherer communities display an ability to name different odors not observed in Western nations or even in a neighboring farming group. Here, two of these hunter-gatherers clear an area to enable the growth of durian, a sweet-tasting but foul-smelling fruit.

Streptococcus pyogenes

BUGGED  In this scanning electron microscope image, Streptococcus pyogenes bacteria (yellow) are shown on top of a white blood cell. Different strains of the bacteria trigger a different reaction from the immune system thanks to extra genes that vary among strains.

Genes & Cells

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