Beneath the University of Arizona football stadium sits the Steward Observatory Mirror Lab. There, giant mirrors are meticulously shaped and polished, to be used in telescopes around the world that are helping unravel the mysteries of the universe. The time-consuming production process requires that each mirror’s surface be polished down …

Subscribe! http://bitly.com/1iLOHml China is one of the few countries still maintaining a strong relationship with the most hostile country in the world: North Korea. Just how close are the two nations? Have more questions about China? Ask China expert, Evan Osnos anything on Hippo Reads! http://read.hipporeads.com/ask-china-expert-and-new-yorker-correspondent-evan-osnos-anything/ The CIA World Factbook: …

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