A new exhibition at the British Library explores science fiction’s olde roots — sketches of fantastical utopias from 1516, virtual realities of Lewis Carroll’s Alice and the first portrayal of a time machine circa 1887. That should knock modern day sci fi writers down a notch, thinking they’re so visionary and original, pffft. “Out of This World: Science Fiction but Not as You Know It,” British Public Library, Since May 20, London