One of the biggest moments at the annual meeting of the American Society of Clinical Oncology last month came when a drug investigator from M.D. Anderson Cancer Center presented explained that a recent clinical trial for the drug Avastin had left doctors "with no more clarity" about how to treat brain cancer patients than they had before the trial, according to the New York Times.

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In Nature this week: Icelandic genome sequences, approach to increase CRISPR efficiency, and more.

Testing showing "genetic incompatibilities" have led thousands of couples in Saudi Arabia to call off their weddings, the BBC reports.

Decode Genetics' ability to tell Icelanders, even ones the company hasn't sequenced, about their disease risk brings up ethical questions.

Genetic analysis of Britain's King Richard III and modern descendants of his relatives indicate breaks in the male line.