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Antarctic Ocean
42
Antarctica
Sea ice
Research vessels
24
Scientists
16
Ships
16
Ice-breaking vessels
15
Biology--Field work
13
Scuba divers
8
Sun--Rising and setting
8
Deep diving
7
Icebergs
7
Antarctic Peninsula
4
Snow
4
Palmer Station
3
Ad??lie penguin
1
Adelie penguin
1
Applied ecology
1
Pygoscelis adeliae
1
Underwater exploration
1
Underwater light
1
Underwater photography
1
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