Myth: Shocking someone who has flat-lined can get their heart started again.
Every year the UK's British Heart Foundation runs a competition to find the most interesting images produced by its researchers—and 2013 is a good, good year. Here are some of our favorites.
Over the past few decades, scientists have suggested that high levels of HDL—which has come to be known as "good cholesterol"—can reduce the risk of heart attack. New evidence, however, suggests that might not be the case after all.