This Week in PNAS

In the early edition of the Proceedings of the National Academy of Sciences, researchers from the UK, the US, and the Netherlands critique a PNAS study, published last year, which had claimed to find links between shifts in immune gene expression — including elevated expression of pro-inflammatory genes — and psychological well being.

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A new analysis indicates that the Ebola virus behind the current West African outbreak is mutating at about the same rate as other Ebola viruses.

With the launch of Scott Kelly into space today, the study of him and his earthbound brother to disentangle the effects of life in space from the effects of genetics kicks off.