Originally published October 17, 2014By Nadia M. WhiteheadChuan Xiao, Ph.D., points at his computer screen, drawing attention to a video playing. In it, bright red and green wiggling dots dart back and forth across a pitch-black background.In this case, the potential hosts are zooplankton, microorganisms that live in the ocean; they are illuminated in red, while the green dots chasing after them are thought to be marine viruses.Xiao, a chemist at The University of Texas at El Paso, is trying to ....