This Week in Science

In Science this week, a multi-institute team of Japanese researchers report new details on the role of epigenetics in sex determination, finding that histone demethylation influences whether an embryo will be male or female. Specifically, the protein Jmjd1a was discovered to control the demethylation of a sex-determining gene called Sry in mice. Loss of Jmjd1a function in developing animals resulted in the reversal of their sex from male to female.

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An Australian study of personalized medicine has run into problems as it recruits patients.

In Science this week: mtDNA analysis give glimpse into decline of Neanderthals in Europe, and more.

The University of Arizona's Raina Maier writes that an understanding of the Earth's microbiome is needed.

The proposed Canadian budget emphasizes partnerships with industry, Nature News reports.