Long story short? Snow is--or was--alive.
"With winter still in effect, the enthusiasm with which one greets fresh snowfall has tended to diminish. Every snowflake may be unique and beautiful, but when millions of them are standing between you and your car, beauty can be ignored. Now a team of scientists has taken a closer look at the particulates that cause snow to form, and it seems that most of them are... alive." --Ars Technica article.