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Antarctica
Research vessels
Antarctic Ocean
34
Ships
25
Sea ice
24
Ice-breaking vessels
21
Scientists
17
Biology--Field work
13
Drake Passage
4
Scuba divers
4
Snow
4
Antarctic Peninsula
3
Deep diving
3
Measuring instruments
2
Palmer Station
2
Applied ecology
1
Ice--Antarctica
1
Icebergs
1
Life preservers
1
Plankton nets
1
Plankton--Collection and preservation
1
Shipping
1
Sun--Rising and setting
1
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