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fizzy chemical

BUBBLE POWER  A fizzing chemical leaves a jet of bubbles in its wake as it races through a liquid. Such bubbles could propel drugs into wounds to stop blood loss. 

sperm and egg

Blocking a newly identified protein in sperm tails stops sperm from penetrating eggs, and could be the key for developing male contraceptives.

measuring blood pressure

MORE MEDS  Aggressively using medication to lower patients’ systolic blood pressure to 120 could prevent heart attacks and strokes, but some experts have questions.

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