Plate tectonics

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Are we alone in the universe?

ARE WE ALONE IN THE UNIVERSE?

The Kepler space mission has produced data that suggests that “based upon the number of M-class stars in the galaxy, that alone represents about 10 billion potentially habitable, Earth-like worlds.”  Our sun is a G-class star.  M-class stars are fainter, cooler stars called “Red Dwarfs.”  To understand the conditions on a planet circling a Red Dwarf, refer to my post here.  Meanwhile, today’s question is “Are we alone in the universe?” Ten billion worlds.  That’s a lot.  Of course, that number is the top end.  Let’s dig into the...

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