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This joke takes advantage of the double meaning of “positive,” meaning both “positive charge” and “are you sure? While it looks like these two carbon elements are out on a date, carbon dating is a method to estimate the age of organic materials. But there are actually two types of carbon: carbon-12 and carbon-14 . Carbon-14 has two extra neutrons and is a bit unstable.

Eventually, carbon-14 will lose those two extra neutrons and become carbon-12.

Since the 1940s, scientists have used carbon dating to determine the age of fossils, identify vintages of wine and whiskey, and explore other organic artifacts like wood and ivory.

The technique involves comparing the level of one kind of carbon atom—one that decays over time—with the level of another, more stable kind of carbon atom.

Graphite, one of the softest materials known, is a form of carbon that is primarily used as a lubricant.

The humerus is the long bone in your upper arm, but the word sounds like “humorous,” as in “funny.” So the joke sounds like it says both “I found this humerous (funny),” and “I found this bone.” If an electron has more positrons than electrons, it has a positive charge.Familiar to us as the black substance in charred wood, as diamonds, and the graphite in “lead” pencils, carbon comes in several forms, or isotopes.One rare form has atoms that are 14 times as heavy as hydrogen atoms: carbon-14, or C ratio gets smaller.C) dating usually want to know about the radiometric[1] dating methods that are claimed to give millions and billions of years—carbon dating can only give thousands of years.People wonder how millions of years could be squeezed into the biblical account of history. Christians, by definition, take the statements of Jesus Christ seriously.

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One, Slate’s Prudence and I did answer the same letter last week. I met him under these circumstances and started dating him almost two years ago for what I thought would be a fling.

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No one actually knows when pottery bowls were first made but it was a very long time before any records were kept and it seems that every culture, all over the world developed the idea of making vessels from clay and baking them so they would be more durable.

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