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Why some memories last a lifetime while others fade fast

Scientists have uncovered a stepwise system that guides how the brain sorts and stabilizes lasting memories. By tracking brain activity during virtual reality learning tasks, researchers identified molecules that influence how long memories persist. Ea…

Scientists uncover the brain’s hidden learning blocks

Princeton researchers found that the brain excels at learning because it reuses modular “cognitive blocks” across many tasks. Monkeys switching between visual categorization challenges revealed that the prefrontal cortex assembles these blocks like…

A common nutrient deficiency may be silently harming young brains

Scientists studying young adults with obesity discovered early indicators of brain stress that resemble patterns seen in cognitive impairment. The group showed higher inflammation, signs of liver strain and elevated neurofilament light chain, a marker …

A hidden brain energy signal drives depression and anxiety

Scientists discovered that lowered brain energy signaling in the hippocampus can lead to both depression- and anxiety-like behaviors in mice. Stress reduced ATP, a molecule important for cell energy and communication. Altering a protein called connexin…

Smoking cannabis with tobacco may disrupt the brain’s “bliss molecule”

Scientists found that people who use both cannabis and tobacco show a distinct brain pattern tied to mood and stress regulation. Their scans revealed higher levels of an enzyme that reduces a natural feel-good molecule in the brain. This imbalance may …

Your anxiety may be controlled by hidden immune cells in the brain

Researchers have uncovered surprising evidence that anxiety may be controlled not by neurons but by two dueling groups of immune cells inside the brain. These microglia act like biological pedals—one pushing anxiety forward and the other holding it b…