On Abbey Road The Beatles sang: Little darling, it's been a long cold lonely winter Little darling, it feels like years since it's been here Here comes the Sun, here comes the Sun and I say it's all right We should all be singing "it's all right" after the Massachusetts Institute of Technology announced the creation of transparent solar cells. If this new MIT technology proves amenable to industrial scale, we could see the entire surface area of a building's windows turn into ...