Resumen de Brief points.

• This article presents news briefs pertaining to science. Low doses of aspirin help to prevent heart attacks In men but, for unknown reasons, not In women. In sonoluminescence, sound waves fired at a fluid can generate superhot flashes inside collapsing bubbles. New experiments with sulfuric acid bubbles find that the temperature hits about 20,000 degrees Celsius--four times hotter than the sun's surface.