ray bradberry was one of the greats of the 20th century science fiction. his was always extremely imaginative about science. one of his great works is "the martian chronicles," which is a series of connected stories about human colonists on mars and what they encounter and what they don't encounter. -- got any of his ideas from ray bradberry, but he is an example of the engagement between the scientific mind and the scientific -- the science fiction appreciating reader. the conversation about ideas, the idea of how you do or don't extrapolate from current circumstances or technology to what might happen or what might huge part ofs a where science fiction and science come together. anything that asks tough questions or poses tough scenarios, pansy situations -- hands you situations that make you think is important because not becoming complacent is important, not losing your imagination is important. to exercise your imagination, including, what if this thing that is really important to you isn't essential to who you are? ursula le guin did a lot of that. s