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Top Stories for January 11

Five goats standing in a pin
NANOS2 knockout bucks generated by somatic cell nuclear transfer of
CRISPR-Cas9 gene-edited fetal goat fibroblasts. Image Credit: Jon M. Oatley.

Transplantation of sperm-producing stem cells

CRISPR-Cas9 gene editing can improve the effectiveness of spermatogonial stem cell transplantation in mice and livestock, a study finds.

New Scientist
CNN

Research article published in PNAS
“Donor-derived spermatogenesis following stem cell transplantation in sterile NANOS2 knockout males,” by Michela Ciccarelli, Mariana I. Giassetti, Deqiang Miao et al.

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Spider with two fangs
Venom drips from the fangs of an Australian funnel web spider.
Image credit: David T. R. Wilson.

Origins of funnel web spider toxins

A highly lethal class of funnel web spider toxins likely developed as predator defense, and the toxin’s human lethality was an evolutionary coincidence, a study suggests.

The Economist
Smithsonian Magazine

Research article published in PNAS
“Australian funnel-web spiders evolved human-lethal δ-hexatoxins for defense against vertebrate predators,” by Volker Herzig, Kartik Sunagar, David T. R. Wilson, Sandy S. Pineda et al.

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Asian giant hornet.
Asian giant hornet. Image credit: The Washington State Department of Agriculture.

Predicting the spread of Asian giant hornet

A study examines the ecological niche and potential invasive spread of the Asian giant hornet, Vespa mandarinia, in North America.

Science News
CBC

Research article published in PNAS
“Assessing the ecological niche and invasion potential of the Asian giant hornet,” by Gengping Zhu, Javier Gutierrez Illan, Chris Looney, and David W. Crowder.

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Featured QnAs

Profile of NAS member Juan Carrillo

QnAs with Juan Carrillo

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Image courtesy of Mariline Silva and Beatriz Rodrigues.

Adélie penguins at Adélie Cove, Terra Nova Bay

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King penguins
"Genome-wide analyses reveal drivers of penguin diversification," by Juliana A. Vianna, et al.

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Parsing penguins’ evolutionary success

Changing environmental conditions and genetic adaptations may explain how penguins radiated and expanded their geographic ranges to encompass diverse environments.

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COVID-19
"US racial inequality may be as deadly as COVID-19," by Elizabeth Wrigley-Field

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US racial inequality: A pandemic-scale problem

In the United States, mortality rates and life expectancy were worse for Blacks during nonpandemic years than for Whites during the COVID-19 pandemic, a study finds.

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Highland wild dog
"Ancestors of domestic cats in Neolithic Central Europe: Isotopic evidence of a synanthropic diet," by Magdalena Krajcarz, et al.

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Ancestry of New Guinea singing dogs

Genetic insights could help shore up populations of a rare dog species thought to be nearly extinct in the wild.

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