Vertebrates-- Cold-blooded vertebrates-- Pisces (Fishes)-- Cat fishes 154 Cold war 35 International relations 22 World politics 20 Cytology 18 Fossil fishes, Pisces, cold-blooded vertebrates 18 Molecular cloning 18 Cold War 17 History 17 Foreign relations 15 United States 13 Genetics 11 Gene Expression Regulation 8 Genetic regulation 8 Globalization 8 Histology 8 Politics and government 8 Cell biology 7 Molecular biology 7 Molecular genetics 7 Soviet Union 7 Cloning 6 Cloning, Molecular 6 Genetic engineering 6 Human rights 6 Laboratory manuals 6 Microscopy 6 Political aspects 6 Relations 6 SCIENCE / Life Sciences / Biochemistry 6