"In science fiction one can say a great many things that are unpalatable, … because it's expressed as science fiction you can slip it past their defenses."
Most time capsules were tossed in the ocean, apparently, then recovered (on the average) about 100,000 years later. They were then kept in the "Post Office" for as many centuries as were necessary.
The danger arises from the paradoxes of time travel; too many alterations in the past can disrupt the present; the timestream is described in this novel as being somewhat flexible, but not very. For example, if you went back in time, and took a can from a stack in the grocery store back to the future, there would be little disruption, despite the fact that a change was made. If you went back to the past and saved JFK, on the other hand, you would change everything.
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Superstrong Multilayer Metal-Graphene Composite Material
Negligible increase in weight increased material strength by hundreds of times.
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'All history was a palimpsest, scraped clean and reinscribed exactly as often as was necessary.'
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The number of different ways to span a thread between a larger number of hooks is astronomical.
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'Merton... placed the electrodes of the sleep-inducer on his forehead.'
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Amphibio 3D Printed Gill Shirt
'... we can descend and live down there at one of those year-round aquatic resorts.'
How Do You Put An Asteroid Into Earth Orbit? Carefully!
'...she would have to be coaxed by another series of pats into a circular orbit.'
PD Aerospace Space Plane By 2023
'The sleek, tapered space shuttle lay immobile upon the private landing field...'
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