Jon Hamilton Jon Hamilton is a correspondent for NPR's Science Desk. Currently he focuses on neuroscience, health risks, and extreme weather.

What Might Be Behind The Mystery Health Problems U.S. Diplomats Are Experiencing

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From Chaos To Calm: A Life Changed By Ketamine

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Marines based in Okinawa, Japan, fire an M136 AT-4 rocket launcher as part of a weapons training exercise on the Kaneohe Bay Range Training Facility, in 2014. Lance Cpl. Matthew Bragg/U.S. Marines/DVIDS hide caption

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Lance Cpl. Matthew Bragg/U.S. Marines/DVIDS

Army 'Leans In' To Protect A Shooter's Brain From Blast Injury

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U.S. Marines fire the Carl Gustav rocket system during live-fire training last October. With each firing, the shooter's brain is exposed to pulses of high pressure air emanating from the explosion that travel faster than the speed of sound. Sgt. Aaron Patterson/3rd Marine Division/DVIDS hide caption

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Sgt. Aaron Patterson/3rd Marine Division/DVIDS

Report To Army Finds Blast From Some Weapons May Put Shooter's Brain At Risk

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Scientists placed two clusters of cultured forebrain cells side by side (each cluster the size of a head of a pin) in the lab. Within days, the minibrains had fused and particular neurons (in green) migrated from the left side to the right side, as groups of cells do in a real brain. Courtesy of Pasca lab/Stanford University hide caption

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Courtesy of Pasca lab/Stanford University

Tiny Lab-Grown 'Brains' Raise Big Ethical Questions

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How do we make sense of all that chatter? Ilana Kohn/Getty Images hide caption

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Ilana Kohn/Getty Images

How People Learned To Recognize Monkey Calls Reveals How We All Make Sense Of Sound

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Plaques located in the gray matter of the brain are key indicators of Alzheimer's disease. Cecil Fox/Science Source hide caption

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Cecil Fox/Science Source

Scientists Push Plan To Change How Researchers Define Alzheimer's

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Courtesy of Michael Rosnach/Harvard University

Failure To Save A Child In Wartime Inspires Wound-Healing Tech

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A hippocampal neuron seen in culture. Dendrites are green, dendritic spines are red and DNA is blue. Science Source/Getty Images hide caption

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Science Source/Getty Images

Sorry, Adults, No New Neurons For Your Aging Brains

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A study in mice suggests that our brains tell us when to start and stop drinking long before our bodies are fully hydrated. Guido Mieth/Getty Images hide caption

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Guido Mieth/Getty Images

Still Thirsty? It's Up To Your Brain, Not Your Body

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This light micrograph of a part of a brain affected by Alzheimer's disease shows an accumulation of darkened plaques, which have molecules called amyloid-beta at their core. Once dismissed as all bad, amyloid-beta might actually be a useful part of the immune system, some scientists now suspect — until the brain starts making too much. Martin M. Rotker/Science Source hide caption

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Martin M. Rotker/Science Source

Scientists Explore Ties Between Alzheimer's And Brain's Ancient Immune System

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Brain MRI BSIP/Collection Mix: Sub/Getty Images hide caption

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BSIP/Collection Mix: Sub/Getty Images

A Tiny Pulse Of Electricity Can Help The Brain Form Lasting Memories

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Maria Fabrizio for NPR

Her Seizures Looked Like Epilepsy, But Her Brain Looked Fine

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