What's new in exploration ///

Once, I was a volunteer science teacher in a Houston-area private school. I taught biology students this line—every molecule in your body, including those controlling your DNA, unless it arrived recently from outer space, came from a very old, earth-based rock. That rock likely was derived from an earlier rock, and so on. Therefore, you really are billions of years old, no matter how nature has reassembled you to look the way that you do today.

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