On Dec. 15, 2023, a user on X with the handle @DesireeAmerica4 shared a quote meme that claimed former U.S. President Donald Trump once said, "Courage is not the absence of fear. Courage is the ...
The stress-induced mechanisms that cause our brain to produce feelings of fear in the absence of threats -- such as in PTSD -- have been mostly a mystery. Now, neurobiologists have identified the ...
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