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- Newsgroups: rec.puzzles
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!uwm.edu!linac!att!att!dptg!ulysses!allegra!princeton!csservices!atomic!ida
- From: ida@atomic (David Goldschmidt)
- Subject: Re: Billion-year survivability
- Message-ID: <ida.722309740@atomic>
- Keywords: pi, Louie
- Sender: news@csservices.Princeton.EDU (USENET News System)
- Organization: Princeton University, Dept. of Computer Science
- References: <1992Nov10.195614.20902@pasteur.Berkeley.EDU> <BxIuMM.GuK@news.cso.uiuc.edu> <1992Nov18.183510.15059@wam.umd.edu> <1992Nov20.050058.11151@cs.cornell.edu>
- Date: 21 Nov 92 01:35:40 GMT
- Lines: 17
-
- Self replicating machines are an interesting idea, but you have to remember
- that they need some material to make new machines out of. Also, it seems
- likely that humans themselves might decide the machines are a nuisance, and
- build something to wipe them out (presumably another self-replicating machine)
-
- What's wrong with putting a probe in a galactic orbit such that it will arrive
- back here in a billion years? You could use a light sail to get it into the
- orbit (after all there's no hurry). To avoid hitting dust, stars, etc, you
- would probably tilt the orbit out of the plane of the galaxy.
-
- Or, you could simply broadcast your message with a header asking for it to be
- returned in a billion years. This probably has as much chance as anything.
- (You can assume any race that can survive that long can decrypt the message
- easily enough. Who knows, maybe they get messages like this all the time.)
-
- David Patterson, guest on this account.
-
-