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For questions that require plausible (better than suspension-of-disbelief) answers based on Real World science that are not necessarily constrained to the known limits of Real World science. Contrast with the hard-science, science-fiction and internal-consistency tags. This tag may not be used alone. This tag may not be used with the science-fiction, hard-science, or internal-consistency tags.
0
votes
Robots with (specifically red) blood
I know you're looking for robots, but have you considered using cyborgs instead?
You have a lot of latitude in deciding how much of the human is left, from RoboCop, who has just his brains, lungs, an …
20
votes
3
answers
6k
views
Is metal-based, or other non-carbon-based, life realistic?
One science fiction short story I read (I don't remember the title or author, sorry!) featured some small creatures (unnamed) that were formed from metal, with the argument that "just like life develo …
4
votes
How could a human-descended race appear to be all-female?
In H.G. Wells' The Time Machine, humanity (at least the above ground portion of it, or the "Eloi") appears to be entirely female. He suggests (explicitly or implicitly, I don't remember) that they rep …
36
votes
5
answers
7k
views
Can a planet realistically have multiple suns?
Several science fiction books I have read (including, IINM, Nightfall by Asimov) have featured planets with several suns. Some worlds where this happened wrought interesting effects on the inhabitants …
5
votes
6
answers
1k
views
How strong would a steam-powered prosthetic arm be?
Partly due to WB's great response to my steampunk questions, I think the world I'll work on next will have to be steampunk :)
If I had a steampunk cyborg running around, what could he do with his arm …
13
votes
1
answer
2k
views
What would a pair of Death Stars do to Earth?
Y'all should know by now that I want to build a Death Star ;-)
Let's assume that we did that already -- and against the odds, we've built two of them, and they're currently in orbit around a planet; …
18
votes
7
answers
6k
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What can we do to Mars to give it a survivable atmosphere?
Some science-fiction books I've read (including more than a few by Ray Bradbury) have men from Earth living on Mars, walking around outside of enclosures. I know that this is currently not realistic, …
25
votes
Can a planet realistically have multiple suns?
This answer was started by Pink's comment on the question.
Kepler/NASA have discovered what they call "circumbinary" planets -- planets that orbit multiple suns (or "stars" or whatever you want t …