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Hace 1 día · The origins of rock and roll are complex.Rock and roll emerged as a defined musical style in the United States in the early to mid-1950s. It derived most directly from the rhythm and blues music of the 1940s, which itself developed from earlier blues, the beat-heavy jump blues, boogie woogie, up-tempo jazz, and swing music.It was also influenced by gospel, country and western, and traditional ...
Hace 1 día · The history of life on Earth traces the processes by which living and fossil organisms evolved, from the earliest emergence of life to present day. Earth formed about 4.5 billion years ago (abbreviated as Ga, for gigaannum) and evidence suggests that life emerged prior to 3.7 Ga. The similarities among all known present-day species indicate that they have diverged through the process of ...
