Modern classical music is music written in the 20th century and beyond. Although much of it draws heavily on earlier forms, modern composers also experimented with rejection of long-held ideas; notably, Arnold Schoenberg questioned the traditional notions of harmony with his twelve-tone system[?], and John Cage questioned the very definition of music with his use of chance and found sounds.
... expeditions to Baja California
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Jacques-Yves Cousteau, (died 1997), French marine biologist and explorer
Alexandra David-Néel, (1868-1969), French explorer, visited ...