🄹🅄🅂🅃🄸🄽 🄿🄴🅁🅁🄾🄽 (@perronjk) 's Twitter Profile
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@perronjk

Canadian living in southern California. Professor of physics. he/him. sites.google.com/view/perronlab…

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calendar_today07-05-2015 00:17:47

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