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Cells

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white rhino

VANISHING ACT  These two female northern white rhinos, seen here at the Ol Pejeta Conservancy in Kenya, are the only living members of their subspecies.

LINE-1 gene

LINE-1 DANCE  RNA copies of a jumping gene called LINE-1 (red) are mass produced in mouse embryos at the two-cell stage of development (shown). DNA is shown in blue and cells’ outer boundaries are drawn in orange in this microscope image. 

four cups of coffee

CUPSA JOE Studies have shown that people who drink four cups of coffee a day have a lower risk of dying of a heart attack. A new study in mice may show one reason for that; caffeine in coffee gives cells energy to fight off damage.

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