Throughout human history, there have been numerous theories
about how music originated. The great naturalist Charles Darwin
thought that music was related to sex. In his view, music
evolved from the mating cries of birds and animals. Others have
proposed that early humans developed singing as a way of
imitating the sounds of nature or communicating over distances
longer than those over which simple speech could travel. The
philosopher Suzanne Langer has speculated that music, language,
and dance not only were used together but also developed
together in early rituals that combined those activities in a
kind of early opera. In fact, however, no one knows how or when
music developed.  Music was an essential element in many early
cultures and civilizations. It is known, for example, that music
was used in various ways by the Egyptians. Egyptian priests
played seven-foot-tall harps in their temples to honor the gods,
and the armies of Egypt were accompanied by drums and trumpets,
instruments that have accompanied