Is Every Snowflake Actually Unique?

You've been told that "no two snowflakes are alike" more times than you can count. But is that actually the case? And if so—why? Fortunately, Joe Hanson of It's Okay to Be Smart has done us the favor of breaking down the science of snowflakes, how they become so intricate, and why, even though some may appear similar,… » 1/07/14 7:30pm 1/07/14 7:30pm