This Week in Science

In this week's Science, an international team led by investigators at the UK's Medical Research Council Laboratory of Molecular Biology shows that "genetic information can be stored in and recovered from six alternative genetic polymers — xeno-nucleic acids, or XNAs, which are not found in nature.

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National Geographic reports that marine mammals have lost a gene that could make them more susceptible to organophosphate damage.

NPR reports on Human Cell Atlas Consortium's effort to catalog all the different cell types within the human body.

The Union of Concerned Scientists surveyed US government scientists about Trump Administration policies and more, Science reports.

In PNAS this week: history and genetic diversity of the scarlet macaw, approach for predicting human flu virus evolution, and more.