13 MAY 2013 by ideonexus

 Dyson Spheres

The purpose of this report is to point out other possibilities which ought to be considered in planning any serious search for evidence of extraterrestrial beings. We start from the notion that the time scale for industrial and technical development of these beings is likely to be very short in comparison with the time scale of stellar evolution. It is therefore overwhelmingly probable that any such beings observed by us will have been in existence for millions of years, and will have already...
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An extraterrestrial civilization grown to a certain population will need to harvest the full resources of it's environment. By converting a planet like Jupiter into a shield around the system's star, the civilization could maximize the use of the sun's output.

25 APR 2012 by ideonexus

 Life Can Go On for Billions of Years

I believe that life can go on forever. It takes a million years to evolve a new species, ten million for a new genus, one hundred million for a class, a billion for a phylum—and that's usually as far as your imagination goes. In a billion years, it seems, intelligent life might be as different from humans as humans are from insects. But what would happen in another ten billion years? It's utterly impossible to conceive of ourselves changing as drastically as that, over and over again. All y...
Folksonomies: evolution progress
Folksonomies: evolution progress

Freeman Dyson quote about the future of humanity.

23 APR 2012 by ideonexus

 The Lifetime of DNA

The messages that DNA molecules contain are all but eternal when seen against the time scale of individual lifetimes. The lifetimes of DNA messages (give or take a few mutations) are measured in units ranging from millions of years to hundreds of millions of years; or, in other words, ranging from 10,000 individual lifetimes to a trillion individual lifetimes. Each individual organism should be seen as a temporary vehicle, in which DNA messages spend a tiny fraction of their geological lifeti...
Folksonomies: evolution wonder dna
Folksonomies: evolution wonder dna
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It exists in living messengers for brief periods of their lifetimes, but communicates across millions of years throughout all life.

01 JAN 2012 by ideonexus

 Sports on Phobos

Because of their small sizes, Phobos and Deimos have very low gravitational accelerations. Their gravities do not pull very hard. The pull on Phobos is only about one one-thousandth of that on Earth. If you can perform a standing high jump of two or three feet on Earth, you could perform a standing high jump of half a mile on Phobos. It would not take many such jumps to circumnavigate Phobos. They would be graceful, slow, arcing leaps, taking many minutes to reach the high point of the self-p...
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How the low gravity and tiny size of Mars' moon would affect the game.

29 MAR 2011 by ideonexus

 Creating a "Seed" of Civilization's Knowledge

I’ve been thinking of civilization (the technium) as a life form, as a self-replicating structure. I began to wonder what is the smallest seed into which you could reduce the "genes" of civilization, and have it unfold again, sufficient that it could also make another seed again. That is, what is the smallest seed of the technium that is viable? It must be a seed able to grow to reproduction age and express itself as a full-fledge civilization and have offspring itself -- another replicatin...
Folksonomies: knowledge civilization
Folksonomies: knowledge civilization
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Is there a way to compress a balanced essence of civilization's knowledge into a package that would allow it to reproduce?