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In Science this week, a multi-institute team reports new DNA- and RNA-like systems engineered using eight nucleotide building blocks — dubbed hachimoji — that form orthogonal pairs. According to the scientists, the synthetic systems meet the structural requirements needed to support Darwinian evolution and offer increased informational density over standard DNA.

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NPR reports that researchers in New York are investigating whether it is possible to edit the genomes of human sperm.

A letter criticizing actions by the US government and research institutions toward Chinese and Chinese-American scientists has garnered more than a hundred signatories.

In an opinion piece at the Nation, Sarah Lawrence College's Laura Hercher argues that everyone should be able to access prenatal genetic testing.

In Nature this week: ancient DNA uncovers presence of Mediterranean migrants at a Himalayan lake, and more.