Purdue University chemist David Nichols says he never intended for the compounds he invented to become harmful street drugs, reports the Associated Press's Seth Borenstein. Chemicals Nichols made as possible treatments to Parkinson's disease or depression, and which were roughly similar to ecstasy and LSD, have been exploited by black market labs as recreational drugs instead, Borenstein says.

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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.