Radiometric dating game
The words are, indeed, largely visual forms; the humor is chiefly for the eye.
[Louise Pound, "The Humorous 'R,'" "American Mercury," October 1924] sound (which tends to be dropped in England and New England) in the speech of the U. Midwest, "under some strange impulse received toward consonantal recovery of balance, making it present even in words from which it is absent, bringing it in everywhere as with the small vulgar effect of a sort of morose grinding of the back teeth." out of their vocabulary, and it is rarely heard in American speech to this day.
The number at the top is how many half-lives have elapsed.
When it appears it is almost always applied to the so-called Belgian hare, which, curiously enough, is not a hare at all, but a true rabbit.
[Mencken, "The American Language"] [N]ear one of them was the dressing-room of the principal danseuse of the establishment, who was at the time of the rising of the curtain consulting a mirror in regard to the effect produced by the application of a rouge-laden rabbit's foot to her cheeks, and whose toilet we must remark, "a running, a rush, a leap, jump; a storming, an attack;" or else a survival of the Old English word with spelling influenced by the Old Norse one.
These limits usually take the form: "Because we observe [X], which occurs at rate [Y], the universe must be at least [Z] years old".
There are three standard creationist responses: First, creationists assert that current rates (Y) are different than past rates.
Play a game that tests your ability to match the percentage of the dating element that remains to the age of the object.