A computerized brain model made from scans of a 15-million-year-old monkey skull suggests that certain primate brains became more complex before growing larger.

Over the millennia primates’ brains have become both larger and more complex, leaving the scientific community at odds over which development occurred first. 
A computerized brain model recently made from scans of a 15-million-year-old monkey skull suggests intricacy over size may win that argument. 
The 3D likeness shows that the brain of the Old World animal was decidedly small, being about the size of a plum. 
Similarly sized primates today have a cerebral mass that’s about twice as big. 
Nonetheless, the model of the ancient monkey’s brain had numerous folds and wrinkles, which are