United States astronomer who discovered Phobos and Deimos (the two satellites of Mars) (1829-1907) | United States explorer who led three expeditions to the Arctic (1821-1871) |
United States explorer who led three expeditions to the Arctic (1821-1871) | |
United States chemist who developed an economical method of producing aluminum from bauxite (1863-1914) | |
United States child psychologist whose theories of child psychology strongly influenced educational psychology (1844-1924) | |
English writer whose novel about a lesbian relationship was banned in Britain for many years (1883-1943) | |