Imagine what brain surgeons could do with a three-dimensional (3D)-printed model of the brain. Not a structural model printed in plastic and uniform throughout, but one that mirrors the heterogeneity ...

The next surprise was that human organoids just kept growing. Mouse organoids were done with making neurons within nine days.

Forbes contributors publish independent expert analyses and insights. I write about the big picture of artificial intelligence. The brain is unimaginably complex. Google and Harvard recently announced ...