No Two Brains Are the Same

By Lilit Dulyan / 8 January 2026

Picture two walnuts. At first, they look nearly identical. But take a closer look, and you’ll see differences in their shape, texture, and colour. Our brains are like that too. They follow a shared blueprint—folds, cells, and wiring—but the details vary from one person to the next. 

More than a hundred years ago, doctors looked at brains after people died and noticed that no two had exactly the same pattern of bumps and grooves. Today, brain images show just how deep these differences go—from the tiniest building blocks to the long wires that send messages across the brain....

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