[HN Gopher] Keeping Time with Zircons
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       Keeping Time with Zircons
        
       Author : bryanrasmussen
       Score  : 18 points
       Date   : 2021-04-24 05:41 UTC (1 days ago)
        
 (HTM) web link (knowablemagazine.org)
 (TXT) w3m dump (knowablemagazine.org)
        
       | Avshalom wrote:
       | Another cool zircon time keeper is
       | https://en.m.wikipedia.org/wiki/Fission_track_dating
        
       | mikewarot wrote:
       | It's hard to keep in mind just how many atoms there are even in
       | something that is only a gram. Even if the impurities are 1 in
       | 10^15, if you have 10^21 atoms, you'll have a million atoms of
       | the impurity. Detection gets better and better as time goes on,
       | we're going to keep learning a lot of interesting things.
        
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       (page generated 2021-04-25 23:02 UTC)