ScienceDaily: Brent Christner, assistant professor of biological sciences at LSU, recently found evidence that bacteria and biological cells are the most efficient ice-forming catalysts in precipitation from locations around the globe. The formation of ice in clouds is important in the processes that lead to snow and rain. Ice-nucleating bacteria — which have been referred to as ‘rain-making bacteria’ — may be significant triggers of freezing in clouds and influence the water cycle. These …