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Tracking the Woolly Mammoth

It turns out that the Siberian woolly mammoth wasn't really Siberian. In research published in Current Biology, scientists looked at mitochondrial DNA from 160 mammoth samples from across Eurasia and North America and found that at some point in the past 150,000 years, North American mammoths migrated back to Siberia over the Bering Strait. When the mammoth finally went extinct in Siberia about 10,000 years ago, it was not of Siberian lineage, reports the New York Times.

Another article in SciAm tracks the process of two paleontologists drilling for mammoth DNA — and clues to their ancient genetics — in ice sediment from the Klondike region of Alaska.

 

The Scan

Rise of BA.5

The New York Times reports that the Omicron subvariant BA.5 has become the dominant version of SARS-CoV-2 in the US.

UK Health Secretary Resigns

Sajid Javid, the UK health secretary, resigned along with Chancellor Rishi Sunak, saying they cannot work with Prime Minister Boris Johnson's government, CNN reports.

Clones From Freeze-Dried Cells

A team in Japan has cloned mice from freeze-dried skin cells, according to the Guardian.

Genome Research Papers on Craniosynostosis, Macaque Retrotransposition, More

In Genome Research this week: structural variants in craniosynostosis, LINE-1 activity in rhesus macaque brain, and more.