An African Elephant bull (Loxodonta africana) swims across the Chobe River, Kasane, Botswana.

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Photo credit: © PETER CHADWICK/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
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Keywords: array, astronomy, astrophysics, caltech, cosmic, microw, microwave, millimetre, observatory, owen, owens, radio, telescope, va, valley