To: RadioAstronomer
Tool making life at an early 1900's level of development should leave a spectroscopic signature of pollution, right? If they build similar industrial machines as we, that is. The long odds are greatly against us if such a civilization exists, because such a level of development would last for a short time before they discovered better methods of power.
Searching for ET is tough! :)
48 posted on
11/12/2003 5:45:11 PM PST by
Brett66
To: Brett66; RadioAstronomer
Tool making life at an early 1900's level of development should leave a spectroscopic signature of pollution, right? Ice cores have shown significant amounts of lead from Greek and Roman smelting operations going back 2000 years. Link
To: Brett66
Searching for ET is going to be tough and dauting task.
50 posted on
11/12/2003 6:32:52 PM PST by
KevinDavis
(Let the meek inherit the Earth, the rest of us will explore the stars!)
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