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June 21, 2013

Aging, intelligence, cooperation, and ecology

The age-specific force of natural selection and biodemographic walls of death "Nonlinear interactions cause the collapse of Hamilton-style predictions in the most commonly studied case..."

GWAS of 126,559 Individuals Identifies Genetic Variants Associated with Educational Attainment "A linear polygenic score from all measured SNPs accounts for ≈2% of the variance in both educational attainment and cognitive function."

Fusing enacted and expected mimicry generates a winning strategy that promotes the evolution of cooperation "reducing conflict intensities among human populations necessitates (i) instigation of social initiatives that increase the perception of similarity among opponents"

Global human appropriation of net primary production doubled in the 20th century

Several scales of biodiversity affect ecosystem multifunctionality

June 14, 2013

Recent and upcoming talks

Last week I was at Mexico's National Laboratory of Genomics for Biodiversiity (Langebio), giving a keynote talk on Darwinian Agriculture and learning about the diverse research program there, from microbial communities to manipulation of ant "bodyguards" by Acacia plants to using yeast to answer fundamental evolutionary questions.

On Sunday, June 23, I'll be giving a talk on Darwinian Agriculture, as part of the "Evolution Out of Bounds" symposium at the Evolution 2013 meeting, in Snowbird, Utah. These annual evolution meetings are usually really interesting, as I've discussed previously, and other talks in the symposium range from evolution of disease to evolving robots. Those interested in our evolution-of-multicellularity research should look for the talk by Kristin Jacobsen on Sunday afternoon and the poster presentation by Jenn Pentz Monday evening.

Nursing Neanderthals, multisexual mutant mice, and the undead

Barium distributions in teeth reveal early-life dietary transitions in primates
"in a Middle Palaeolithic juvenile Neanderthal... exclusive breastfeeding for seven months, followed by seven months of supplementation.... [then] Ba levels in enamel returned to baseline prenatal levels, indicating an abrupt cessation of breastfeeding at 1.2 years of age"

Serotonin signaling in the brain of adult female mice is required for sexual preference
"male mutant mice lacking serotonin have lost sexual preference.... female mouse mutants lacking either central serotonergic neurons or serotonin... displayed increased female-female mounting"

Regeneration of Little Ice Age bryophytes emerging from a polar glacier with implications of totipotency in extreme environments "following 400 y of ice entombment... [bryophyte cells can ] dedifferentiate into a meristematic state (analogous to stem cells) and develop a new plant."

Quorum-sensing autoinducers resuscitate dormant Vibrio cholerae in environmental water samples
[I wonder if this would work with other "unculturable" microbes.]