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America also has a spot softer than a newborn’s fontanelle for shallow nonsense.

“The plates of its skull had not completely fused and the fontanelle was still open,” said Gatrell, meaning part of the chick’s brain had herniated out of its skull.

The incubator, the tube in our son’s nose, the tender fontanelle of his crown – these were the only things I allowed myself to care about.

The researchers attached a 40-gram ultrasonic probe to the anterior fontanelles of six healthy babies.

In some taxa, the sinus is completely roofed over by bone, only the circular fontanelle being present.