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    Re: Dung beetles navigate by stars
    From: Noell Wilson
    Date: 2015 Aug 29, 20:11 -0700

    Being sort of gulible, I ordered "20 optical rough calcite mini rough crystals" so I could play Viking. Didn't work on a cloudy day. No sun image on a paper and I couldn't detect any spots of brightness to mention when I looked through them. The crystals are about 1/4 to 3/8" across and I probably have 19 left.

    It seemed like a good idea at the time.

    Regards, Noell

       
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