Science fiction novels started quite a while back – with some of their authors envisioning things that are now a reality. (Though Frankenstein’s monster has, thankfully, yet to make an appearance.)
And my personal favourite of these,
I devoured all of his Mars & Pellucidar books as a teen. And the non-sci-fi Tarzan books, too, of course, my attraction to them being inspired by adolescent attraction to Ron Ely.