Resumen de Brief points.

• Presents a list of briefs related to science. Findings that men with levels of the prostate-specific antigen thought to be normal actually had prostate cancer; How 47.6 percent of neckties worn by clinicians harbored bacteria that could cause disease according to a study by the American Society for Microbiology; Consideration of how the Institute of Physics found 31 supermassive black holes by pulling together data from many telescopes; Others.