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Electric metabolism
There is a school of thought that the very beginnings of life were connected with the potential and proton-concentration gradients that form in micropores around deep-sea black smokers. Which means that the most primitive of life processes (before any genetic material develops, even) are essentially electrical.

I'd like to extend this thought. There are many energy sources that aren't exploited much by life forms - at least, as far as we know. One energy source that comes to mind is ionising radiation, which ought to be plentiful on young planets or around hot stars.

Messages In This Thread
Electric metabolism - by CCostello - 08-08-2014, 07:22 AM
RE: Electric metabolism - by iancampbell - 08-08-2014, 07:55 AM
RE: Electric metabolism - by stevebowers - 08-08-2014, 03:36 PM
RE: Electric metabolism - by Dalex - 08-08-2014, 06:32 PM

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