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Laugh It Up, Just Like Your Ancestors Did

23andMe's ErinC has a post at the Spittoon about a paper in Current Biology from researchers at the University of Hannover in Germany who studied laughter in humans and apes. The findings indicate that "not only are the hoots, hollers and snorts of the great apes really laughter, but the evolutionary relationships between the sounds match up with the known evolutionary relationships between the species based on genetics," the blog says. That suggests that laughter "can be traced back 10 to 16 million years to our last common ancestor with the great apes," ErinC writes. "Analysis of the chortles of a lesser ape, the siamang, suggests that laughter may be even older."

The Scan

Two J&J Doses

Johnson & Johnson says two doses of its SARS-CoV-2 vaccine provides increased protection against symptomatic COVID-19, CNN reports.

Pfizer-BioNTech Vaccine Response in Kids

The Pfizer-BioNTech SARS-CoV-2 vaccine in a lower-dose format appears to generate an immune response among children, according to the Washington Post.

Chicken Changes to Prevent Disease

The Guardian writes that researchers are looking at gene editing chickens to help prevent future pandemics.

PNAS Papers on Siberian Dog Ancestry, Insect Reproduction, Hippocampal Neurogenesis

In PNAS this week: ancestry and admixture among Siberian dogs, hormone role in fruit fly reproduction, and more.