Jon Hamilton Jon Hamilton is a correspondent for NPR's Science Desk. Currently he focuses on neuroscience, health risks, and extreme weather.
Jon Hamilton 2010
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Jon Hamilton

In experiments involving people with epilepsy, targeted zaps of the lateral orbitofrontal cortex region of the brain helped ease depressive symptoms. Getty Images hide caption

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Scientists Improve Mood By Stimulating A Brain Area Above The Eyes

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Patients awaiting epilepsy surgery agreed to keep a running log of their mood while researchers used tiny wires to monitor electrical activity in their brains. The combination revealed a circuit for sadness. Stuart Kinlough/Ikon Images/Getty Images hide caption

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Stuart Kinlough/Ikon Images/Getty Images

Researchers Uncover A Circuit For Sadness In The Human Brain

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How does the brain's working memory actually work? Jon Berkeley/Ikon Images/Getty Images hide caption

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Jon Berkeley/Ikon Images/Getty Images

Neuroscientists Debate A Simple Question: How Does The Brain Store A Phone Number?

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The cerebellum, a brain structure humans share with fish and lizards, appears to control the quality of many functions in the brain, according to a team of researchers. Science Source hide caption

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Science Source

The Underestimated Cerebellum Gains New Respect From Brain Scientists

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"We have only begun to scratch the surface of the complex problems inherent in figuring out ... the brain's inner workings," said Paul Allen in 2012. Kum Kulish/Corbis/Getty Images hide caption

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Kum Kulish/Corbis/Getty Images

A 291-day-old retina. Our ability to see colors develops in the womb. Now scientists have replicated that process, which could help accelerate efforts to cure colorblindness and lead to new treatments for diseases. Johns Hopkins University hide caption

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Johns Hopkins University

Human Retinas Grown In A Dish Reveal Origin Of Color Vision

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If you like sudoku, go ahead and play. But staying sharp means using many parts of your brain. Yasuyoshi Chiba/Getty Images hide caption

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Yasuyoshi Chiba/Getty Images

A Brain Scientist Who Studies Alzheimer's Explains How She Stays Mentally Fit

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The fix was in for this rhesus macaque drinking juice on the Ganges River in Rishikesh, Uttarakhand, India. No gambling was required to get the reward. Fotofeeling/Getty Images/Westend61 RM hide caption

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Fotofeeling/Getty Images/Westend61 RM

In Lab Turned Casino, Gambling Monkeys Help Scientists Find Risk-Taking Brain Area

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A government research project to assess the safety of BPA is beginning to show results. T-pool/STOCK4B/Getty Images hide caption

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T-pool/STOCK4B/Getty Images

Government Study Of BPA Backs Its Safety, But Doesn't Settle Debate

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Scientists at Johns Hopkins University are studying barn owls to understand how the brain maintains focus. Meredith Rizzo/NPR hide caption

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Meredith Rizzo/NPR

Scientists Study Barn Owls To Understand Why People With ADHD Struggle To Focus

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These PET scans show the normal distribution of opioid receptors in the human brain. A new study suggests ketamine may activate these receptors, raising concern it could be addictive. Philippe Psaila/Science Source hide caption

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Philippe Psaila/Science Source

An image of a rosehip neuron (top) and a connecting pyramidal cell (bottom). Tamas Lab/University of Szeged hide caption

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Tamas Lab/University of Szeged

What Makes A Human Brain Unique? A Newly Discovered Neuron May Be A Clue

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Heavy weapons like this shoulder-launched multipurpose assault weapon deliver a powerful blast to the shooter's head. D. Gonzalez/1st Marine Division hide caption

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D. Gonzalez/1st Marine Division

Heavy Weapons Training May Cause Brain Injuries, But The VA Doesn't Cover It

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Sarah Gonzales for NPR

Marines Who Fired Rocket Launchers Now Worry About Their Brains

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