When the roundworm Caenorhabditis briggsae became capable of self-fertilization, that ability may have triggered the loss of thousands of genes, the New York Times reports.

"Many of these genes had been around, and were presumably needed, for tens of millions of years or longer," senior author Eric Haag from the University of Maryland tells the Times.

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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.