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Alexander Gruber (moderator) top 2% overall

did you know that cigarette lighters were invented before matches?

Interesting reading:

First, there are many good posts to be found among the longest answers.

I'm a fan of the posts by this mysterious stranger. Sometimes, we need a Man in Black to chase.

I have learned a lot from Arturo Magidin's posts here about group theory. Here's one of my favorite examples.

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