I'll take this as my chance to recommend Ted Chiang -- he is among the very best short story writers working in science fiction (I say confidently, not having done an extensive survey...). His works are remarkably clever, from Understand, which does a credible job of portraying human superintelligence, to Exhalation, which explores the concept of entropy in a fascinating way. And of course Story of Your Life, on whic…
His collection Tenth of December is probably my favorite.