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Pikaia gracilens, the earliest known vertebrate ancestor, from the Middle Cambrian of British Columbia
(image by Nobu Tamura)
Posted on May 10, 2012 via fauna with 48 notes
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prehistoric-backroads reblogged this from scientificillustration and added:
I forgot to include this guy in my first rough draft. (And by “forgot,” I mean “wasn’t aware of its existence until I...
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