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Fossils of Pikaia gracilens dating back 505 million years found in a quarry in the Burgess Shale, Yoho National park in Canada Photo: PA

1 posted on 03/06/2012 10:12:39 AM PST by Renfield

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To: Renfield

Probably a collateral branch.

44 posted on 03/07/2012 4:11:23 PM PST by chesley (Eat what you want, and die like a man. Never trust anyone who hasn't been punched in the face)

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