Subject
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Technology-History.
15
Animals
14
Life sciences
14
Climatic changes
13
Gravitation.
13
Naturalists
13
Aeronautics
12
Computer science
12
Gardens
12
Humanities
12
Mathematics -- History.
12
Computers
11
Mechanics.
11
Quantum physics.
11
Quantum theory
11
Mathematicians
10
Particles (Nuclear physics)
10
Petroleum industry and trade
10
Planetology.
10
Spectroscopy.
10
Astronomers
9
Computers-History.
9
Cultural heritage.
9
Economic history.
9
Engineering design
9
Inorganic chemistry.
9
Mathematical physics.
9
Mathematics_$xHistory
9
Mines and mineral resources
9
Nuclear physics.
9
Oceanography
9
Popular works.
9
Relativity (Physics)
9
Science.
9
Water-supply
9
Archaeology
8
Chemistry, Organic.
8
Coal mines and mining
8
Environmental sciences
8
Forest management
8
Internet
8
National parks and reserves
8
Paleontology
8
Physical geography
8
Quantum theory.
8
Religion and science
8
Science, Ancient.
8
Social change
8
Transportation
8
Whaling
8
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