OLLI Nature Lovers Book Group
Nature and Books belong to the eyes that see them. Ralph Waldo Emerson
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Tuesday, October 24, 2017
This Gigantic Lava Tube Could Be Home for Moon Colonists
https://www.nbcnews.com/mach/science/gigantic-lava-tube-could-be-home-moon-colonists-ncna813396
The hollow is so huge it could swallow up a big city like Philadelphia.
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