the.com/cranium
the bony helmet your brain demanded before the species evolved actual helmets
fused platesEight bones knit into one at adulthood
baby gapsSoft spots let infant skulls flex through birth
thicknessAverages just 6.5 millimeters of protection
suturesWavy seams lock bones like jigsaw teeth
weightRoughly 1.4 kilograms guarding three pounds of thought