Have you read the bit on half-lifes? We have a pretty good grasp on the periodic table, we know where all the radioactive decaying elements fit in, and we know their half-lives.
There's a line that shows up. There are lots of substances with half-lifes longer than a billion years or so, and you can find _all_ of them occuring naturally. There are even more with half lives shorter than that, and _none_ of them occur naturally. The idea that the earth is a few billion years old (4 or 5 half-lives to reduce by >99%) seems like a pretty good explanation to me, no moon rocks necessary. (Yes, carbon is an exception, UV light, etc.)
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I bought the same device a year ago and the upgrade from ice cream sandwich to jelly bean went just fine; thanks for asking.
1 in 6 are target shooters? I call bullshit on this one. Citation?
Have you read the bit on half-lifes? We have a pretty good grasp on the periodic table, we know where all the radioactive decaying elements fit in, and we know their half-lives. There's a line that shows up. There are lots of substances with half-lifes longer than a billion years or so, and you can find _all_ of them occuring naturally. There are even more with half lives shorter than that, and _none_ of them occur naturally. The idea that the earth is a few billion years old (4 or 5 half-lives to reduce by >99%) seems like a pretty good explanation to me, no moon rocks necessary. (Yes, carbon is an exception, UV light, etc.)
I expect he was referring to Michael Richards (Kramer), Seinfeld's co-star on the show.