Mice lacking a certain neurotransmitter receptor have trouble forgetting scary experiences. This finding uncovers a fear-regulating feedback loop in the brain that might be at work in humans, too.
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Dudai, Y. Fear thou not. Nature 421, 325–327 (2003). https://doi.org/10.1038/421325a
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DOI: https://doi.org/10.1038/421325a
