Very interesting history of the periodic table and those who created it.
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I came in in the middle and haven't heard the first half yet, but I loved the second half.I heard it on Science Zone Radio, which is talk-radio but not politics and also has no commercials, or at least I didn't notice any.
I get it using RadioMaximus (free also) on the computer but there may be other ways, other than finding urls like the one above and playing each of them separately.