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Resharing the Hard Scifi circle, including some new additions. Thanks to everyone who has participated.

If you want in, please +1 and feel feel to reshare - grow this circle. Recommend any new people you would like to see in it!
#hardscifi #hardscience #hardsciencefiction #scifi #scififans #science #sciencesunday #sciencefiction #scienceisawesome
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