This Week in Science: Feb 22, 2019

Feb 22, 2019

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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The Scan

This One Might Not Be Due to Humans

A new analysis suggests warming, not the arrival of humans, led to the extinction of the woolly rhinoceros thousands of years ago, the Economist reports.

Not the Wings

Chinese health officials uncovered SARS-CoV-2 viral RNA on imported frozen food, but the New York Times reports catching COVID-19 that way would be unlikely.

More Vaccines on Order

The UK has ordered 60 million coronavirus vaccine doses from Novavax and 30 million doses from Janssen, according to the Guardian.

Science Studies Include Ion Channel Mutation Prediction Model, Variant Linked to Disrupted Sleep

In Science this week: machine learning model predicts whether ion channel mutations will cause disease, and more.

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