Can humans live on other planets?

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Discussion Overview

The discussion revolves around the feasibility of human life on other planets, exploring the implications of gravity, biological adaptations, and the challenges of colonization. It includes theoretical considerations, potential biological engineering solutions, and experimental observations related to development in varying gravitational conditions.

Discussion Character

  • Exploratory
  • Debate/contested
  • Conceptual clarification

Main Points Raised

  • Some participants propose that human bodies may require Earth-like gravity, suggesting that living on other planets could be impossible without it.
  • Others argue that rotating space stations could provide sufficient centripetal acceleration to simulate gravity, potentially allowing for human habitation.
  • A participant raises the concern that if humans plan for permanent colonization, the challenges of muscle and bone loss may differ from those faced by individuals returning to Earth.
  • There is a viewpoint that the harsh conditions of other planets necessitate significant biological engineering before colonization can be viable.
  • One participant questions the effects of different gravitational environments on embryonic development, referencing an experiment with tadpoles that exhibited abnormal growth in zero gravity.

Areas of Agreement / Disagreement

Participants express multiple competing views regarding the requirements for human life on other planets, with no consensus on the feasibility of colonization or the necessary adaptations.

Contextual Notes

Limitations include assumptions about gravity's role in human biology, the dependence on future technological advancements for biological engineering, and the unresolved effects of varying gravity on development.

Aquamarine
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Our bodies may require a gravity that is equal to that of Earth. If so, then it may never be possible to live on other planets. The future of humanity may therefore be in outer space, for example in rotating space stations.

http://www.faqs.org/docs/Newtonian/Newtonian_91.htm

Does anyone know more about this?
 
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Surely the rotating space stations could rotate at the necessary angular velocity to provide us with sufficient centripetal acceleration?

They could use low doses of anabolic (low androgenic) steroids to prevent muscle wastage. Side effects would be minimal (because of the low doses and the specific nature of the steroids that would be used for this purpose).
 
Aquamarine said:
Our bodies may require a gravity that is equal to that of Earth. If so, then it may never be possible to live on other planets.

I think this largely assumes that the person is returning to Earth someday (in which case bone & muscle loss would be difficult once he/she returns to "normal" gravity). If the person is planning permanent colonization (obviously a goal for future generations), then the problem may not be as great.
 
Other planets are extremely harsh. We could go there at enormous cost, but humans are not made for other planets. Colonization will await serious biological engineering.
 
I also wonder about the effects of different gravity in the embryonic development... I think they grew tadpoles (or a earlier stage, I don't recall) in zero gravity once, and they grew somehow turned in a wrong direction, but I don't remember of other effects, if they completed the development besides that or not...
 

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