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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What happens to scientific papers when certain journals are no longer published? Some scientists are trying to make sure they don't disappear forever.

A study in Microbiome finds that heavy drinkers have an unhealthy mix of bacteria in their mouths.

Doctors and patients are still trying to figure out what role at-home genetic testing should play in healthcare, Newsweek says.

In Genome Research this week, mismatch repair deficiency in C. elegans, retracing transcriptions start site evolution in the human genome, and more.