Ancient Rome was more than just gladiators and emperors. But as the Roman civilization was extremely stratified — about 1.5 percent of the population controlled the government, military, commerce, and religious institutions — what we do know of it is "skewed," says Ed Yong at CNN's Light Years blog.

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Jay Shendure and his colleagues have developed a new method to more comprehensively identify human cell types, the NY Times reports.

Researchers in the UK and Japan have shown that infertility in mice with three sex chromosomes can be overcome, according to the Guardian.

China is embracing preimplantation genetic diagnosis, Nature News reports. 

In PLOS this week: host genetic factors associated with cervical neoplasia progression, population patterns for an ancient flowering rainforest plant, and more.