SportsPulse: There are a lot of theories being thrown around regarding the surge of home runs in the MLB -- juiced balls, steroids -- but before we jump to conclusions, one Washington State professor is taking a good, long look at the science behind the ball's flight. » Subscribe to USA TODAY Sports: https://bit.ly/2L0ktE1 » USA TODAY delivers current local and national news, sports, entertainment,  finance, technology, and more through award-winning journalism, photos, videos and VR.