This Week in PNAS

Researchers led by Cornell University's Alon Keinan report in the Proceedings of the National Academy of Sciences that the human population has increased by about 100-fold during the past 3,000 years to 4,000 years. By focusing on regions of the human gene that are under neutral selective pressures and examining them in people with homogenous ancestry, they devised models showing that people have been experiencing a 3.4 percent population growth rate per generation for about the last 140 generations.

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Researchers have sequenced the northern white rhinoceros to gauge whether it could be brought back from the edge of extinction, the New York Times reports.

Bavaria expands its forensic genetic analyses to include DNA phenotyping, raising discrimination concerns.

Tufts University researchers found a role for miRNA in transmitting stress between generations, the Economist reports.

In Science this week: gut microbiome influences liver cancer growth, spread; and more.