Scientists figure a comet started breaking up about 12,800 years back. Nothing unusual there. Many comets break up while they're this close to our sun.
This time Earth got in the way before the fragments spread out much.
Fire rained from the sky, consuming forest and meadow alike.
Sounds a bit like Genesis 19:1, now that I think of it. Except we didn't start building cities until a few millennia later. Or maybe we haven't found our first cities yet. And that's another topic or two....
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