AccuWeather (Aug. 2) -- Major League Baseball hitters are on a path to smash the record for home runs set in 2000. Air density, the humidity of the ball and warmer weather are all factors influencing ball travel, says Alan Nathan, a professor emeritus of physics at Illinois. “People know, players even know, understand intuitively if nothing else, that the ball simply does not carry as well in cold weather as it does in warm weather,” Nathan says. Also: Atlanta Journal-Constitution (Aug. 3)