Subject
Scientists
5
Mathematicians
4
Astronomers
3
Natural history
3
Women
3
Women mathematicians
3
Computers History
2
Entomologists
2
Naturalists
2
Physicists
2
Women naturalists
2
Women scientists
2
African American biologists
1
African American scientists
1
African American teachers
1
African American women mathematicians
1
Animal painters
1
Aquariums History
1
Artists
1
Astronomy, Greek
1
Astrophysics
1
Basset hound
1
Biologists
1
Birds
1
Black bear
1
Caldecott Medal
1
Childhood and youth
1
Chimpanzees
1
Chronometers History
1
Clock and watch makers
1
Clocks and watches
1
Comets
1
Computers
1
Dinosaurs
1
Dinosaurs Models History
1
Discoveries in science
1
Earth (Planet) Figure Measurement
1
Education
1
Entomology
1
Entomology History
1
Environmentalists
1
Geographers
1
Geography, Ancient
1
History
1
Ichthyologists
1
Insects
1
Insects Metamorphosis
1
Inventors
1
Longitude Measurement History
1
Marine biologists History
1
more ...