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.
... explorer of the Pacific and Antarctica
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Eric the Red, (c.950-1003), explored and colonized Greenland
Leif Ericsson, (born 970), attempted to colonize Vinland
George ...