Just how Ötzi, the Tyrolean Iceman who died more than 5,300, met his demise isn't quite clear. His well-preserved body shows evidence of both an arrow wound to the shoulder and, more recently discovered, a blow to the head.
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The World Health Organization calls for the public release of clinical trial results within a year of the completion of data collection.
In Science this week: measles virus nucleocapsid structure, and more.
African and US health officials work to establish an Africa-wide Centres for Disease Control and Prevention.
Nature has retracted a 2002 epigenetics paper for image manipulation.