Okay, this is mostly for my own benefit for a book/series that I'm writing, so that I've got notes written down somewhere, but feel free to join in.
The idea is that science often takes from science fiction, but science fiction is based in science fact. Whatever we write, has to be believable to a certain degree.
And in science fiction there are things that need to be overcome, such as "how does anti-gravity on a space ship actually work?"
So, off this entry I (or anyone) will create a conversation for each Sciency Thing, and then post ideas or thoughts about how to make it work.