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hand holding pill

GO LOW  A prototype male birth control pill caused reproductive hormones in men to plummet to levels known to halt sperm production.

progenitor cells

BYE BYE BUDS  Mice that became obese on a high-fat diet (right) lost a quarter of their taste buds (stained red) and also had fewer progenitor cells (stained green) — which give rise to new taste buds — than mice of a healthy weight on a regular diet (left).

doctors in an operating room

WELL-TREATED  Kidneys from hepatitis C-positive donors were successfully transplanted into 10 uninfected patients. The recipients did not develop chronic infections, a new study reports.

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