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Some Big Trees

The San Francisco Chronicle reports that researchers have sequenced the genomes of both the coast redwood and the giant sequoia. It adds that having the trees' genomes may enable researchers to figure out ways to protect them from the effects of climate change.

According to the University of California, Davis, the coast redwood genome is the second-largest genome ever sequenced at a size of 27 billion basepairs, which it notes is nine times the size of the human genome, which is about 3 billion basepairs. The giant sequoia genome, meanwhile, is about three times the size of the human genome, it adds. The researchers, who are from UC Davis, Johns Hopkins University, and the Save the Redwoods League, have made their data publicly available.

"Now we can screen for genetic diversity and make restoration decisions," Emily Burns, the director of science for Save the Redwoods League, tells the Chronicle. "We want to know which genes are influential for drought tolerance and fire resistance. It's the road map for how we are going to conserve the species in the future."

The Scan

Booster for At-Risk

The New York Times reports that the US Food and Drug Administration has authorized a third dose of the Pfizer-BioNTech SARS-CoV-2 vaccine for people 65 and older or at increased risk.

Preprints OK to Mention Again

Nature News reports the Australian Research Council has changed its new policy and now allows preprints to be cited in grant applications.

Hundreds of Millions More to Share

The US plans to purchase and donate 500 million additional SARS-CoV-2 vaccine doses, according to the Washington Post.

Nature Papers Examine Molecular Program Differences Influencing Neural Cells, Population History of Polynesia

In Nature this week: changes in molecular program during embryonic development leads to different neural cell types, and more.