With every advance in sequencing technology, researchers are examining older and more challenging samples to study ancient organisms, including humans, writes Nature's Ewen Callaway.
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In PNAS this week: human T cell editing with CRISPR, retrotransposons acting as insulators, and more.
The New York Times' George Johnson muses on cancer's roots in multicellularity.
The San Diego Union Tribune wonders whether Medicare is ready for personalized medicine.
Jun Wang, the chief executive of BGI, has stepped down.