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Zero Gravity is a powerful and inspirational story about education, science, and the next generation that follows a diverse group of middle school students who compete in a nationwide competition to code satellites aboard the International Space Station.Seen through the wondrous eyes of three young innovators and their first-time coach, they each embark on an intimate and perso...。非洲象已不足40万头，而中国是第一大非法象牙消费市场。为打击非法象牙交易，一连串行动展开，致力保育非洲的野生动物。。