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Working on a race of rock people who live in a fantasy setting. Realistically, how would they obtain energy (do they need to eat? breath?) and how could they reproduce or perform other biological processes?

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closed as too broad by Cort Ammon, JDługosz, Vincent, Zxyrra, SRM Jan 19 '17 at 3:08

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

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    $\begingroup$ Most of these are questions which you, as an author, get to choose. There's no Codex of Fantasy Species which specifies what behaviors your rock people need. $\endgroup$ – Cort Ammon Jan 19 '17 at 0:40
  • $\begingroup$ I would suggest you to rethink your question into something more "Is my rock people species plausible?". $\endgroup$ – rschpdr Jan 19 '17 at 0:51
  • $\begingroup$ you might want to look at Terry Pratchett's trolls which are living rock, they think faster when its cold becasue their brains are made of impure silicon and they have diamond teeth to chew rock. $\endgroup$ – John Jan 19 '17 at 1:36
  • $\begingroup$ Are we talking about straight rock people or more like a granite clad pangolin? (the latter actually sounds semirealistic to me now that I think of it, hmm...) $\endgroup$ – Samwise Jan 19 '17 at 2:49
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If they are rock people, as in creatures made entirely of rock, then they wouldn't require energy. They would basically be magically animated constructs. In this way, they could "reproduce" by animating other rock.

If you would rather them be biological with a rocky shell, then that can be done many ways. You could take the simple approach of having them be like an organism on Earth, but with a rocky exoskeleton, skin, or shell. Or, you could try creating a biological creature different than one on Earth that incorporates a rocky carapace. In this way, they could reproduce like biology we know (sexual or asexual), and could have methods of removing their shell, if you couldn't find a way around it.

If you want them to be rocky, but not biological, yet still requiring energy, you could either make them able to gain energy magically, or you could have their shell absorb energy in some fashion. A porous rock would allow liquids to get in, so many they have mechanisms that can get nutrients from certain liquids. Or, you could have metal shells that are conductive, allowing them to absorb heat or electricity. This could be intriguing, as cold could possibly be a weakness for them. In this way, as they aren't biological, they may not be able to reproduce. But you could also have them unable to die, as they aren't living. They can only be destroyed. Otherwise, magic could let them make more of themselves.

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