The US has been experiencing extreme weather lately, and some of these storms have brought record-breaking amounts of snow to big swaths of the country. Of course the snow has made it onto social media, including pictures of people showing off their "snow cream" and "snow cocktails" creations. You know not to use the yellow snow in your snowy desserts. But should you even be eating any snow—is it actually safe? We asked a few experts about it. What is snow, exactly? First, some background on snow: The pretty white stuff is just precipitation in the form of ice crystals....