New habitable planet only 20 lightyears away

Twenty light years is really not that far. Not sure how good present technology is for building a tight beam laser for communication at that distance, but a round trip communication would only require 40 years, if their civilization was equal to our own in that technology.

I grew up reading the fiction of Clark, Heinlein, Asimov, and many others. But as I have gotten older and learned more concerning the way proteins work, and the variety of them, I have become convinced that any planet that was similiar enough to have a breathable atmosphere would be instantly lethal because of the differance in protiens produced by the life there.
 

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