Despite the headline, this isn't really a story about superconductivity—at least not the superconductivity that people care about, the stuff that doesn't require exotic refrigeration to work. Instead, it's a story about how superconductivity can be used as a test of some of the weirder consequences of quantum mechanics, one that involves non-existent particles of light that still act as if they exist.
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Pokémon Day is an annual celebration of all things Pokémon. It is held every year on Feb. 27 to mark the release of the original game in Japan. You can expect a lot of exciting announcements and product launches to go live on the big day, but there's actually no need to wait.，推荐阅读爱思助手下载最新版本获取更多信息
Yogita LimayeSouth Asia and Afghanistan correspondent