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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 …
Shokhet's user avatar
  • 2,841
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 …
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  • 2,841
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 …
Shokhet's user avatar
  • 2,841
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 …
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  • 2,841
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 …
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  • 2,841
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; …
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  • 2,841
18 votes
7 answers
6k views

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, …
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  • 2,841
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 …
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