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"If you can't contain it, you can't study it. That's the case with antimatter, an elusive substance that may hold secrets to matter, time and the universe. So far experiments, including work at CERN in Switzerland, had failed to confine antihydrogen. In this landmark 2010 paper, Gorm Andresen and his colleagues described the first experiments that trapped 38 antihydrogen atoms. Their work was enabled by plasma physics research and has opened the door to precise measurements of antihydrogen and other antimatter atoms."
G.B. Andresen, et al., "Trapped antihydrogen." Nature468, 673-676 (2010). [DOI: 10.1038/nature09610]. Subscription required: contact your local librarian for access. (Image credit: Adapted by permission from Macmillan Publishers Ltd: Nature, ©2010)