Deep in the Navel

There are parts of the body that people tend to scrub well and others that may only get a passing wash. The belly button, Rob Dunn from North Carolina State University tells NPR's Talk of the Nation, might not be the cleanest spot, but it is home to tens of bacterial species in the average person, though across the population the navel is home to thousands of species.

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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.