Researchers at Cambridge University have discovered a protein in the brain of mice that may act as a biomarker for malleable memories. In other words, they may be able to determine which memories we can erase and which we are, for whatever reason, stuck with. Up front: The researchers conditioned laboratory mice by simultaneously shocking them and making a clicking noise. The mice naturally associated the sound with the shock and, thus, developed a fear response. Because the mice remembered being shocked, they associated the noise with discomfort. The researchers then injected the mice with propranolol, a beta-blocker, and the…
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