A mother and daughter herd their yaks along a highway on the Tibetan plateau.
Frederic J. Brown/AFP/Getty Images
July 2, 2014 When it comes to living at extreme altitudes, Tibetans may have gotten a leg up from Denisovans, a species of archaic humans that lived about 50,000 years ago.
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Secretary of State Hillary Clinton on Dec. 4 in Brussels, before she fell ill.
Kevin Lamarque/AFP/Getty Images
December 31, 2012 The clot is located in a vein that's in the space between her brain and skull. A statement by Clinton's physicians released by the State Department said the clot did not result in a stroke or neurological damage. The statement added that the doctors were "confident she will make a full recovery."
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