Differences between writing sci-fi and writing fantasy?
Well, fantasy is, as my friend so eloquently puts it, made up shit. Sci-Fi is also made up shit, but it’s made up based on a thing, an idea or hypothesis or theory, that has happened or could maybe one day happen some time in the future, possibly. AI or contact with Aliens, for example – things that haven’t happened yet but could. Or may not.
For me personally though there isn’t a huge amount of difference. I write about things I enjoy and am interested in. I love science, but I also love mythology and folklore and history which are all things you would typically research when writing a fantasy. Even fantasy not set on another world. JK Rowling for example didn’t really just make it all up as she went along – so much of that stuff is based on what were real beliefs, myths and legends.