A beaver's teeth do not stop growing. If they don't gnaw on trees there teeth will grow long enough to curl up into there brain.

PS, OF, I too have heard of the million dollar space pen... I also read that it's just a tall tale.
Irish-I've been around you long enough to know you were just "bustin my balls!" Jsut thought I'd add my 2 cents...

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Put me on wheels and I'll turn tricks.

Clever? Nah, I ran out of that years ago. But if you find this, let me know, k?
"The road goes ever on..." ~ Tolkien

In memory of my friend skip...
Go then, there are other worlds than these