Alex Hughes talks about makes up classic science fiction from the 18th and 19th centuries. We get geeky with Shirley Temples and discuss how we come to love what we love in SF as well as the boundaries of genre. ** Corrections: 1. Alex mentions Gregory Benford's Timescape the particles which are actually called Tachyon (/ˈtæki.ɒn/ -- Tay-Key-On).2. Dark Matter is edited by Sheree Thomas who also edited Octavia Butler's Brood.