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Opinion: #Conservation policies often rely on models and data—but what if those inputs are flawed? Without better ways to revise decisions, #endangered #species like the gopher #tortoise may suffer. ow.ly/B2ZR50VYPMS #HumanDevelopment #ClimateChange #DemographicModel

A rich trove of fossil teeth and scales tells a story of changes in marine fish communities in the ancient Tethys Ocean after the K-Pg extinction event. Sharks flourished and diversified after the event; ray-finned fishes declined. In PNAS: ow.ly/XBnf50VYQVN

A newly identified SIK3 gene mutation is linked to naturally short sleep duration in humans and mice. It shows how kinase activity affects sleep and could help target better sleep efficiency. In @gizmodo: ow.ly/5rhZ50VYQiu In PNAS: ow.ly/JYct50VYQit

Hells Canyon dramatically divides Oregon and Idaho. A study finds that North America’s deepest river gorge was rapidly incised 2.1 million years ago when the Snake River was captured by a tributary of the Columbia River. In PNAS: ow.ly/ZvQe50VYR0Y

How do London cabbies navigate 26,000+ streets? In a new Science Sessions episode, Hugo Spiers, Pablo Fernández Velasco & Eva-Maria Griesbauer explore human route planning through taxi drivers’ insights. Listen: ow.ly/B6HQ50VZaTw

Mistaken eyewitness identification is one of the leading causes of false convictions. AI analysis of the statements people make during identifications—e.g., “I am pretty sure,”—can help people assess which witnesses are reliable. In PNAS: ow.ly/SNLy50VZjeq

Pollen grains dating back 123 million years from Portugal’s Lusitanian Basin show the grooved shape of eudicots—the earliest known tricolpate pollen—shedding light on early flowering plant evolution. In PNAS: ow.ly/4F4j50VZjC7

One of the most-viewed PNAS articles in the last week is “Active learning increases student performance in science, engineering, and mathematics.” Explore the article here: ow.ly/WTUf50VZrJY For more trending articles, visit ow.ly/EkxX50VZrJV

A genetic study of nearly 1 million people—including 1,000+ with extra or missing sex chromosomes—finds Y chromosome genes explain ~23% of the average height difference between XX and XY individuals. In PNAS: ow.ly/1enu50VZjq7

In this issue: Vortex feeding in flamingos, molecular events underlying concussion symptoms, and reducing specimen irradiation during biological imaging. In PNAS: ow.ly/ZISx50W0UGt

The antidepressant effect of exercise is well established. A study in mice explores the mechanism, finding that exercise boosts release of oxytocin in the nucleus accumbens by neurons originating in the paraventricular nucleus. In PNAS: ow.ly/Rp0G50W0USE

Improving baby #health in #DevelopingCountries could start with videos on a #SmartPhone. In PNAS Journal Club: ow.ly/nMS250W0UnQ #language #development #BabyTalk #parentese #Ghana #learning

Humans have fished for Atlantic bluefin tuna for millennia. Ancient DNA shows that the species began a demographic decline by around 1900 and that modern populations have significantly lower genetic diversity than historical populations. In ONAS: ow.ly/290G50W0Vg4

One of the most-viewed PNAS articles in the last week is “Exotic mechanical properties enabled by countersnapping instabilities.” Explore the article here: ow.ly/oPzA50W0Vjr For more trending articles, visit ow.ly/4NbX50W0Vjt.

Expression of the protein stathmin-2 is lost in many neurodegenerative diseases. A study in mice shows that stathmin-2 is required for axonal repair and restoration of nerve function, although not through tubulin binding, as had been proposed. In PNAS: ow.ly/zFti50W0V5R

On June 3, National Academy of Sciences President Marcia McNutt will explore the current status of the US research enterprise and strategies for navigating a rapidly changing scientific landscape. Register now: ow.ly/8Ak850W1AVa #StateOfTheScience

Baby #fish can drift thousands of miles on #ocean currents—but where they end up is still a mystery. This PNASNews feature dives into #PelagicLarvalDispersal and what it means for #MarineEcology, #learning, and #development ow.ly/siET50W1Mkm #ClimateChange #GulfStream

Fifty children had up to 11 brain scans throughout their childhood; the images show nonlinear changes in cortical thickness. Infant frontal lobe thickness predicts neurocognitive function at age nine, measured by a working memory task. In PONAS: ow.ly/4NaU50W1Pq2

How do we remember past events? In a PNASNews QnAs, National Academy of Sciences member Nora Newcombe (Temple University) reveals that pattern separation and completion in episodic memory operate independently. A new view on how memory works. Read more: ow.ly/bwHw50W1PtJ

Dioecious plants have separate male and female individuals, and temperature sensitivity may vary between sexes. A study of a dioecious grass species, Texas Bluegrass, shows that poleward shifts will be shaped by male heat intolerance. In PNAS: ow.ly/RIWC50W1O06