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, looks can be deceiving.
As it turns out, snowflakes are complicated little buggers. Take a few hexagons of water molecules, throw in randomness, and you've got a seemingly infinite number of snowflake shapes at your fingertips. All further proof that, if you know where to look, physics can be absolutely beautiful. [YouTube]