Science and technology

Associated Press
In this Jan. 26, 2015 photo, Wenjun Li, a marine chemist from China, walks along the beach in search of samples in Punta Hanna, Livingston Island, South Shetland Islands archipelago, Antarctica. Parts of Antarctica are melting so rapidly it has become “ground zero of global climate change without a doubt,” said Harvard geophysicist Jerry Mitrovica.  (AP Photo/Natacha Pisarenko)

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