Vermilion Cliffs 6

The name "Vermilion" comes from Latin vermiculus = small worm, cochineal (which yields a red dye).
Chemically, vermilion is mercuric sulfide.

There: you've got two facts which you will not remember, and which would have no practical value if you did--unless you're an etymologist, a chemist, or a contestant on Jeopardy.

Put this cross on a T-shirt!