Science fiction writers are considered to be one of the most knowledgeable and creative classes of writers in the modern literary world. Science fiction writing demands a great deal of creativity and imagination as it is a form of fiction that draws imaginatively on scientific knowledge and speculation in its plot, setting or theme. Science fiction writing uses science as a backdrop against which most of the incidents occur and therefore writers of this genre must have a clear understanding of scientific terms and their meanings. Science fiction is largely based on writing rationally about alternative possible worlds or futures. It is similar to, but differs from fantasy in that, within the context of the story, its imaginary elements are largely possible within scientifically established or scientifically postulated physical laws. Science fiction writers use different scientific themes such as time travel, superhuman abilities, an outer space universe or a story set in post-apocalyptic world. Among the most respected awards for science fiction are the Hugo Award, Nebula Award and Saturn Award. They often explore the potential consequences of scientific innovations and produce astonishing masterpieces for their readers. Read on to discover about the life and works of various famous Sci-fi writers from all over the world.