Complex sentence: While the razor has been in existence before the Bronze Age, the oldest razor like-object was discovered in 18,000 B.C., its modern counterpart was invented in the 18th century, and the 1930s saw the invention of electric razors.
Split into simpler sentences: While the razor has been in existence before the Bronze Age. The oldest razor like-object was discovered in 18,000 B.C. Its modern counterpart was invented in the 18th century, and the 1930s saw the invention of electric razors.