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- Newsgroups: sci.space
- Path: sparky!uunet!psgrain!ee.und.ac.za!ucthpx!casper.cs.uct.ac.za!bjohnson
- From: bjohnson@casper.cs.uct.ac.za (B Johnson)
- Subject: What about the time ? (ETI)
- Message-ID: <Bs8yJG.CFL@casper.cs.uct.ac.za>
- Summary: What about the time problems involved ?
- Keywords: ETI
- Organization: Computer Science Department, University of Cape Town
- Date: Fri, 31 Jul 1992 09:33:15 GMT
- Lines: 40
-
- I've been reading about this ETI question, and it seems to centre on whether
- or not these amino acids etc. can spontaneously join. To me it seems
- unlikely.
-
- However one question that seems to be ignored is the length of time that
- the intelligence would hang around for.
- Take earth as an example...
- Universe created circa 15 billion years ago
- Earth formed circa 5 billion years ago
- Projected sun-life another 5 billion years. ie at max we have 5B years to
- find out how to leave, where to go and how to get there.
- Man emerges circa several thousand years ago (controversy on this point
- but safe to say less than a million.
- Takes most of that time to develop up to the industrial revolution.
- Only been able to fly 89 years (excepting ballons), leave the atmosphere
- about 30 years. Radio telescopes etc used for trying to find ETI all
- developed this centuary.
-
- Projected stay on earth ? Considering Ozone, CO2, over population,
- desertification, exhaustion of natural resources etc etc we seem to
- have a few problems. (ps lets not leave out Nuclear war ?). Now
- assuming we manage to solve these problems (and we probably will
- one way or another ) the question is how close did we come ? and how
- often ? to destroying ourselves ?
-
- OK so for life to be out there it has to have developed in a similar
- timescale - if we want to hear it, it has to have broadcast xx years
- ago, to get here conveniently in time for us to develop the tech. to
- listen. Then they have to survive long enough for the message to get
- here, and for us to do something about it. What do we do ? E-Mail
- back ??? Plug them into INTERNET ??
-
- Now here's the crux. Even if we discover "life exists *there*"
- do we believe in travel at speeds faster than light. And
- disbelieve all the wacko time effects Albert E. would have us
- believe. Yes ? No ? So does it matter even if they were there.
- Does it affect us ??
-
- Bruce
- <bjohnson@casper.cs.uct.ac.za>
-