 the year 1975 in science and technology involved some significant events, listed below. ==astronomy and space exploration== * april 19 â aryabhata, india's first satellite, is launched using soviet boosters. * july 17 â apollo-soyuz test project: an american apollo and a soviet soyuz spacecraft dock with each other in orbit marking the first such link-up between spacecraft from the two nations. * august 20 â viking program: nasa launches the viking 1 planetary probe toward mars. ==biology== * august 7 â cÃ©sar milstein and georges kÃ¶hler report their discovery of how to use hybridoma cells to isolate monoclonal antibodies, effectively beginning the history of monoclonal antibody use in science. * living specimens of the chacoan peccary (catagonus wagneri), previously known only from fossils, are identified in paraguay. ==climatology== * august 8 â the term global warming is probably first used in its modern sense by wallace smith broecker.{{cite news|last=johnson|first=brad|title=wally's world|url=http://www.foreignpolicy.com/articles/2010/08/03/wallys_world|work=foreign policy|date=2010
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