Neuroscientists Just Launched an Atlas of the Developing Human Brain

Neuroscientists Just Launched an Atlas of the Developing Human Brain

Your brain is one enigmatic hunk of meat—a wildly complex web of neurons numbering in the tens of billions. But years ago, when you were in the womb, it began as little more than a scattering of undifferentiated stem cells. A series of genetic signals transformed those blank slates into the wrinkly, three-pound mass between …