Withdraw cash stiffen expository essay writing famous In a press release Harvard Professor of Physics Mikhail Lukin said, “Most of the properties of light we know about originate from the fact that photons are massless, and that they do not interact with each other… What we have done is create a special type of medium in which photons interact with each other so strongly that they begin to act as though they have mass, and they bind together to form molecules.” 必須 2000文字以内 [bbs:youtube:(Youtubeの動画ID)]と書くとYoutubeの動画が貼れます。(例:[bbs:youtube:OQThUAQ0UN0])