How to make a brain: new experiments challenge existing picture0

• SCIENCE, Science / Health, Science Mission Directorate, scientists, Space, Space Communications & Navigation Program, Space Launch System (SLS), Space Telescope, space-x-ipo, SpaceX
• September 19, 2026

Blood vessels (artificially coloured) snake through a a mouse’s brain.Credit: Simon Walker-Samuel, UCL CABI/Science Photo Library For decades, many scientists have thought that a single type of starter cell gives rise to the entire brain. But experiments now challenge that fundamental picture, providing evidence that it takes not one but two flavours of progenitor cell