Water usually appears clear, but ice cubes and ice on lakes often looks cloudy. Learn what has to happen for ice to freeze clear (like black ice does on roads) 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
