From this letter: "So the earth started to cool. It took a long time over it. Gradually the surface of the earth became cooler although the interior remained very hot. Even now if you go down a coal mine it becomes hotter and hotter as you go down."
From this letter: "So the earth started to cool. It took a long time over it. Gradually the surface of the earth became cooler although the interior remained very hot. Even now if you go down a coal mine it becomes hotter and hotter as you go down."
0 COMMENTS:
Post a Comment