Jon HamiltonJon Hamilton is a correspondent for NPR's Science Desk.
Researchers say human brains can become overwhelmed by cute traits, such as large eyes and small noses, embodied by movie characters like Bambi.
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Before light reaches these rods and cones in the retina, it passes through some specialized cells that send signals to brain areas that affect whether you feel happy or sad.
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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.
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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
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.
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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