Shares in Stratagene fell 3.1 percent for the trading week ended Tuesday. The decline followed last week's drop of 23.3 percent, but the reasons for its fall remain unclear. Stratagene's shares finished Tuesday at $7.16 hovering above a 52-week low of $6.42 reached last September. Bruker led gainers for the week with a 6.3-percent rise.

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Magdalena Skipper, the incoming editor-in-chief of Nature, speaks with NPR's Weekend Edition Sunday.

Genetic genealogy has led to an arrest in another cold case, dating back to 1987.

In PLOS this week: mutation in second gene widens clinical symptoms of people with ADD3 mutations, comparative genomic analysis of Pseudovibrio, and more.

Wired reports that 23andMe is trying to bolster its outside collaborations.