Tiny portions of blood collected from Scott Kelly as he orbited the Earth in the International Space Station are being doled out among researchers to study the effect of space on cancer risk, immune function, and more, the Los Angeles Times reports. Those samples are being compared to ones taken from identical twin brother, Mark Kelly, a retired astronaut, who remained on Earth.

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Researchers hope to tease out the signature effects that different carcinogens leave on the genome to determine their contributions to disease, Mosaic reports.

The Wall Street Journal looks into the cost of new gene therapies.

An Imperial College London-led team reports that it was able to use a gene drive to control a population of lab mosquitos.

In PNAS this week: genomic effects of silver fox domestication, limited effect of mitochondrial mutations on aging in fruit flies, and more.