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Anthropologist Stefan Helmreich of the Massachusetts Institute of Technology peers from a porthole during his first dive in Alvin. Swimmer Mark Spear dived underwater to capture the photo while helping to deploy the sub.


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Anthropologist Stefan Helmreich of the Massachusetts Institute of Technology peers from a porthole during his first dive in Alvin. Swimmer Mark Spear dived underwater to capture the photo while helping to deploy the sub.

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