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Antarctic Ocean
34
Antarctica
Research vessels
Sea ice
24
Ships
24
Ice-breaking vessels
20
Scientists
14
Biology--Field work
11
Scuba divers
4
Snow
4
Antarctic Peninsula
3
Deep diving
3
Drake Passage
3
Palmer Station
2
Applied ecology
1
Icebergs
1
Life preservers
1
Measuring instruments
1
Plankton nets
1
Plankton--Collection and preservation
1
Sun--Rising and setting
1
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