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| Editing
and fact checking provided by Laurence Pringle. |
| Inset
photograph of Bob Marstall in his polar parka by Kelly
Tyler. |
| All
postcard photographs (unless otherwise noted) by Bob
Marstall. |
| Underwater
Weddell seal sounds courtesy of Terrie M. Williams,
Center for Ocean Health, University of California,
Santa Cruz. |
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