In this episode, we sit down with neuroscientist Dr. Richard Haier to unpack what intelligence and IQ actually look like inside the brain. We talk about what decades of brain imaging research reveal about IQ, why higher intelligence is linked to more efficient brain activity, and what PET scans, genetics, and network models tell us about how intelligence works at a biological level.

We also explore common misconceptions about IQ, the limits of what training and environment can change, and what current science does and does not support when it comes to increasing intelligence.

This conversation focuses on evidence, not ideology, and draws from over 50 years of research in neuroscience and intelligence science.

Topics covered in this episode: – How IQ relates to brain efficiency – What PET scans reveal about intelligence – The  ...