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information about Polar night field

Field Hierarchy
Parent
Biology
35.7M papers
Physics
32.4M papers
Quantum mechanics
13.4M papers
Geography
11.5M papers
Geology
9.4M papers
Ecology
8M papers
Meteorology
2.7M papers
Astronomy
2.5M papers
Oceanography
2.5M papers
Climatology
655k papers
Current
Polar night
1,410 papers
Child
Trends