A team of scientists in Beijing have discovered novel inferences concerning the learned fear response in humans.
Relax, this is a good thing.
Learned fear is a condition that scientists dont know a whole lot about.

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A fear conditioning paradigm was adapted for simultaneous SCR-iEEG recordings.
During the task, patients were instructed to view the stimuli displayed on the screen.

In other words:The researchers made study participants look at a screen.
When a certain color square showed on the screen, they got a little electrical shock on their wrist.
When a different color square appeared, nothing happened.
Quick take:This is incredible work.
you might read the whole paperhere on Science Advances.