Observed arrival · 2026-09-18
Xenocortical Mice: A Field Guide to Part-Human Brains
An illustrated explainer site about lab mice whose brains contain substantial amounts of human neural tissue, and the medical and ethical questions that follow.
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- For
- Readers seeking a plain-English guide to brain research and bioethics
- Worth noticing
- The homepage organizes the subject around three questions: what the animal is, why it was built, and whether it could have a mind.
Field notes
The project breaks its subject into an animal explainer, a medical-purpose explainer, and an ethics explainer, then extends the discussion into a comparison with machine intelligence. Its homepage includes concrete figures such as approximately 4 million human cells per brain, 100,000 cells per injection, and three months to integrate. Source links identify a Paşca lab study, Nature, The Guardian, and the Nuffield Council on Bioethics.
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