How the reactionless space drive could send nuclear subs into orbit

In 1956, Astounding Science Fiction gushed about the wonders of a reactionless space drive invented in 1956 by Norman L. Dean. It could propel a converted atomic submarine into space, editor John W. Campbell wrote. He added, "The modern nuclear submarine is, in fact, a fully competent space-vehicle . . . lacking only… » 1/14/14 9:00am 1/14/14 9:00am

Which Alternate Universe Has The Best Science Fiction?

Nobody knows better than science fiction fans that a few minor changes to the timeline can alter everything. And science fiction istelf could have turned out totally differently if just a few things had changed. Which alternate versions of science fiction history would have resulted in a more interesting SF landscape… » 6/18/08 5:00pm 6/18/08 5:00pm