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web | ||||
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web | LiveScience | 2018-01-24 | ||
web | Laura Geggel | LiveScience | 2016-07-03 | |
web | ScienceDaily | 2015-08-06 | ||
web | Tia Ghose | LiveScience | 2015-07-14 | |
web | Megan Gannon | LiveScience | 2014-02-03 | |
web | Douglas Main | LiveScience | 2013-07-05 | |
web | William G. Eberhard | Nature | 2000-07-20 | |
web | Bill Watterson | 1993-06-27 |