Snow usually appears white, but it can come in a few other colors -- and in the case of red snow, that vibrant color may be a warning from Mother Nature. Learn why in this episode of BrainStuff.Learn more about advertising on the HowStuffWorks podcasts at www.howstuffworks.com/advertisers.htmAnd to learn about your ad choices when listening to podcasts, visit https://www.howstuffworks.com/privacy.htm#ad-choices
