How much do scientists know and how much do they guess at, asks The New York Times' James Gorman. It may seem counterintuitive, but speculation in science is important, he says, and does have its place among the facts and data.
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Researchers trace DNA on a clay pipe found at a former slave site to a population that lives in what is now Sierra Leone, the Washington Post reports.
Two researchers report on their genetic analysis of samples from a shawl thought to belong to a victim of Jack the Ripper, ScienceInsider reports.
Japan is to release rules governing some gene-edited food, according to NHK World.
In PLOS this week: computational strategy for improving gene set analysis testing, miRNAs linked to sleep apnea, and more.