They say that no two snowflakes are the same. That may be true, but snowflakes share some striking similarities. Take a look at these snowflakes: See a pattern? It may not be immediately clear, but ...

Here's a question to ponder during these cold, wintry days: How big can snowflakes get? Part of the answer depends on what you mean by the word "snowflake." The other part of that answer depends on ...