No Two Snowflakes are Alike
Contrary to popular belief, there are some circumstances that can result in matching snow flakes. The size and shape of a snowflake mostly relies on the temperatures at which it freezes. Larger, more complex snowflakes that form at lower temperatures will vary in design. It is incredibly rare that you'd find two large snowflakes that look exactly alike, as their molecules will have frozen in a sudden and unique pattern.
However, there have been instances of smaller flakes formed at higher temperatures that appear indistinguishable, even under a microscope. They tend to be significantly less complex and generally form in the same basic shape.
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