The next time it's snowing and you open your mouth to catch snowflakes on your tongue, think about this: Scientists say they're full of bacteria. That's right. Bacteria are everywhere in the atmosphere, and a large number of them can even cause diseases in plants, according to scientists at Louisiana State University.

When snow and rain form in the sky, the moisture needs something to grab onto in order to condense. The scientists found that this something is bacteria. The group of scientists examined precipitation from various locations including France, Montana, and the Yukon. The bacteria were most prevalent in France.