A new compound promises to give skin a suntan without the sun. Alert: Major redhead news! For all of theof the world, we know the feeling of wanting a natural tanned glow. Many redheads tried countless sunless tanners and at some point in life, accept the skin for what it is: fair, gorgeous.. and not able to tan. But there is hope — researchers in the US have successfully darkened human skin cells grown in a petri-dish, providing an artificial tan that lasted for days. The Massachusetts…