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An analysis of carbonaceous meteorites by NASA scientists and their colleagues found that those meteorites contain some nucleobases and nucleobase analogs. As they report in PNAS, they analyzed 12 meteorites by liquid chromatography-mass spectrometry to ascertain whether nucleobases and nucleobase analogs were present and, if so, at what abundance.

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Novavax has begun a phase III trial of its SARS-CoV-2 vaccine, according to the New York Times.

Vox reports that the Trump Administration may limit student visas for individuals from some countries to two years.

The governor of New York says the state will conduct its own review of any SARS-CoV-2 vaccine, NPR reports.

This week in Science: Neanderthal Y chromosomes replaced by Homo sapiens Y chromosomes, and more.