SMRTR Science & EngineeringJun 22, 2026Quartz

25 things neuroscience has discovered about the brain in the last few decades

SMRTR summary

Neuroscience has made remarkable strides in understanding the brain over recent decades, overturning long-held assumptions. The adult brain can grow new neurons, a process called neurogenesis, and remains highly adaptable throughout life. Sleep actively clears toxic waste from the brain, gut bacteria influence mental health, and chronic stress physically shrinks brain tissue — discoveries that are reshaping medicine and how we understand human behavior.

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