Science fiction is traditionally based on sound science.
Many such works, however, extrapolate into the future. An example would be the so-called "double-talk" drive that permits faster than light travel--interstellar travel just doesn't work without this extrapolation. Readers will forgive these extrapolations if the other science is sound and it is introduced in a plausible manner.
But too much of that and you end up writing fantasy whether you meant to or not.
Re: Discussing hollow earth theory and other nonsense
You already have all the answers about the earth's interior, makes me wonder what would drive you to converse with a misguided delusional person, quoting from a scientifically unreliable source, what is more, none of you are able to remain on the topic, but are caught up in personal problems that interfere with you logging into the Source I proposed.
Your post is in our Science Forums. Here, you have to expect that evidence is required to support one's claims.
You don't like what I have said, and you don't have any use for the references from the Bible.
The bible is not evidence! It is subject to multiple interpretations, as it is littered with allegory, parables, and allusions, and has been translated from one language to another several times. And the selection of books to be included, or rejected, has been very subjective.
As Heinlein noted,
The Bible is such a gargantuan collection of conflicting values that anyone can prove anything from it.
There is no point in me replying here.
Your choice. But realize that the fact that you are dodging our replies suggests some things about the strength of your evidence.
Religious belief does not constitute scientific evidence, nor does it convey scientific knowledge.
Belief gets in the way of learning--Robert A. Heinlein
How can I possibly put a new idea into your heads, if I do not first remove your delusions?--Robert A. Heinlein
It's not what we don't know that hurts, it's what we know that ain't so--Will Rogers
If I am entitled to something, someone else is obliged to pay--Jerry Pournelle
If a religion's teachings are true, then it should have nothing to fear from science...--dwise1
"Multiculturalism" does not include the American culture. That is what it is against.
In regard to creationists and creationist websites, perhaps a few humble words of wisdom from The Sensuous Curmudgeon might be of interest.
In a recent blog, dealing with a letter to the editor by a creationist, The Sensuous Curmudgeon concludes:
Geoffrey’s letter is a very good one. Why? Because it supports your Curmudgeon’s often-expressed opinion on the futility of debating or even talking to adult creationists. If someone is still a creationist when he’s past his student years, there’s no way to break through whatever it is that grips him. Although we hear occasional tales of successful de-programming efforts, those are extremely rare. The effort may seem worth the bother to you, but we think it’s an unproductive expenditure of time.