Climate Central: Next time you're flying somewhere and the plane knives through a cloud, consider this from a new study published on Monday: that cloud is teeming with microscopic particles, including some of the same bacteria you encounter regularly on the ground.
According to that new study, published in the journal Proceedings of the National Academy of Sciences, those microorganisms likely play a key role in forming clouds and precipitation The study alters scientists' understanding of how microorganisms spread...