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.
... a land called Punt
Sven Hedin[?], (1865-1952), explorer
Bjarni Herjulfsson[?] - Viking discoverer of North America
Thor Heyerdahl, (1914-2002), Norwegia ...