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Geological Outreach on Twitter: ""I'm warning you: hide your good rocks". Wise words, Bert from the Geology Dept. @bigbangtheory https://t.co/MQo9f91BDz" / Twitter
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David W. Whitlock on Twitter: "@StephenB_Eccher Looks the the geologist, Bert Kibbler on The Big Bang Theory. https://t.co/9j8e6Qll8E" / Twitter
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