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Wednesday, February 29, 2012

"No Two Snowflakes Are Alike": True or False?

If you look closely at a natural snowflake, you'll see that it is based on a six-sided hexagon, but has a very complicated, delicate shape overall. You've probably heard the statement that "no two snowflakes are alike". Is this really true, and how do we know?

Of course, no one has inspected every snowflake that has fallen and compared it to every other snowflake throughout history. Certainly, if you look at a number of flakes from a single snowfall, you won't find any copies. And, given the number of variations that a flake's shape can take on, it is very, very unlikely that two have ever had exactly the same shape. And snowflake shapes are influenced by the air temperature, humidity, and other factors that also influence the shape. So, while it's not absolutely impossible for two snowflakes to look alike, you shouldn't waste time looking for them!

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