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Eastern and western monarch butterflies of North America are genetically similar, a new genomic analysis has found.

In eastern North America, monarch butterflies make long treks from their summer homes as far north as the US-Canadian border to their winter homes in Central Mexico, a flight that can be 3,000 miles long. West of the Rocky Mountains, monarch butterflies take a shorter trip of about 300 miles to California, suggesting that the two populations may be genetically distinct.

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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.

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