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Quite cool: click.
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I am an avid reader of Science Fiction but at the same time realize that most of it is unrealistic. We have both resource issues and physics issues. We don’t have the resources to carry out these grandiose schemes but even if we did we have not discovered a way to protect humans from cosmic and solar radiation. If humans were to attempt to inhabit the moon or mars they would have to live well underground most of the time. Humans and life in general has thrived on earth because the geomagnetic field has offered protection from solar and cosmic radiation. Spending years or centuries in space is not at the present time something humans can survive.
@Ron Beasley: It also looks like it’s the magnetic field that helps keep the Earth’s atmosphere around.