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A volcanologist collects lava samples at Hawaii Volcanoes National Park, part of the U.S. Geological Survey’s ongoing research into volcanic activity. The park is home to Kilauea, one of the world’s m...
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A volcanologist collects lava samples at Hawaii Vo...

April 11, 2018 - Washington, District of Columbia, United States of America - Mark Zuckerberg, Co-Founder and CEO of Facebook, testifies before a meeting of the United States House Committee on Energy...
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April 11, 2018 - Washington, District of Columbia,...