This is today’s edition of The Download, our weekday newsletter that provides a daily dose of what’s going on in the world of technology. Meet a mouse whose brain cortex is made up of human cells Multiple cameras tracked a mouse as it wandered around a small arena.
Source: [MIT Tech Review](https://www.technologyreview.com/2026/09/17/1144314/the-download-mice-part-human-brains-climate-tech-innovators/)