Using Plastic Surgery To Keep Astronauts Human On Long Space Missions

A brief exchange in the back of last week's issue of New Scientist asks: "I understand that the lines and sagging skin we acquire as we age are due to the sun and gravity. If I lived in a space station in zero or microgravity away from the sun, would I stay looking young?" A perfectly innocuous, if even somewhat boring, question--but the answer, supplied by a reader from London, touches on some fascinating terrain.