A comb is a tool consisting of a shaft that holds a row of teeth for pulling through the hair to clean, untangle, or style it. Combs have been used since prehistoric times, having been discovered in very refined forms from settlements dating back to 5,000 years ago in Persia. A typical plastic comb. Egyptians were among the earliest, if not the earliest, to develop combs circa 5500 BCE. Persians also developed combs around 3000 BCE or so. Early...