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From: "Tobias DiPasquale" <anany@ece.vill.edu>
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Subject: Re: All computers in the world MUST sync with ATOMIC clock before 12:00 AM  21 July 2001!!!
Date: Tue, 24 Jul 2001 13:16:59 -0400
Organization: Villanova University
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In article <3b558159.185372902@news.mel.connect.com.au>, "Frank Adam"
<fajp@smartchat.net.au> wrote:

> On Wed, 18 Jul 2001 07:32:42 -0400, "Steve Gomori"
> <sgomori@no.spam.yahoo.com> wrote:
> 
>>> It does not lose or gain one second
>>> even after running for 25 MILLION YEARS!!!
>>
>>It's been running for 25 million years? Who set it? Who made the
>>batteries?
>>
> The same guy who sold the properties on Mars. :-) Regards, Frank.

For a description of how the cesium clock works, see this page:

http://www.nist.gov/public_affairs/releases/clockworks.htm (pictures)

and also here:

http://www.its.bldrdoc.gov/fs-1037/dir-007/_0912.htm