Brains Do Not Grow in Captivity

We now know enough about the brain to realize that its mystery will always remain. Like a work of art, we exceed our materials. ~Johan LehrerWhen our daughter was a preschooler, authority figures informed parents that the human brain was fully formed by around five-years-old. After that, there would be no new brain cells, which was why, they told us, the early years were so important. These were the scientific facts. Just a few days ago, a parent of a preschooler told me that the director of her child’s school told the assembled parents that the human brain was “90 percent developed” by five, information which she conveyed to me in a kind of jittery breathiness that betrayed both awe and panic. I recall feeling similarly about these scientific facts. The problem with these facts is that they were not facts 20 years ago and they are not facts today. They are the product of a debunked theory about human brain development. Sadly, these non-facts were, and still are, being used to support…