In a recent paper in the New England Journal of Medicine, researchers at Brigham and Women's Hospital in Boston report their discovery of stem cells in the human lung, reports the Associated Press' Malcolm Ritter.
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Differences in DNA methylation could be used to distinguish between DNA samples obtained from identical twins, researchers say.
A retrovirus that's been integrated into the human genome appears to have a role in embryonic development, researchers report.
A report from MIT identifies areas of scientific research where declining research support is hindering needed advances.
In PLOS this week: phylogenetic study of hepatitis E viruses in Swedish moose, recombination sites in the honeybee genome, and more.