when was the earth invented? when was the milkyway galaxy invented? when was the universe invented? and who invented them. also its my birthday.

the difference is that white collar worker performs skills like worker as a scientist or well blue collars do physical work and they do services like being a cook.

in the 1950s, country music came into its own before rock-n-roll took off in the 60s while jazz and classical music continued to innovate