Apollo fuel cell power plant
1972
1972
1839 (original); circa 1988 (replica)
circa 1972
(1962); 1982
1971
1990-96
1971
1903 (original); 1982 (model)
1971
2000-100 BCE
1972
1970
4000-2001 BCE
1970
1970
1970-1971
1970
1972
1971
About 1970
1970
1970
1972
1972
1970
1970-1972
1970
1972
1971
1971
1972
1971
1971
1971
1971
1971
1971
1971
1980-1950
1970
1971
1970
1970
circa 1970
1972
1972
1972
1970
1972
1972