# Scientists are growing human brain tissue in living mice—could this make their welfare harder to assess?

- Source: Phys.org
- Published: 2026-10-19T20:40:04+00:00
- Category: Science
- Original: https://phys.org/news/2026-10-scientists-human-brain-tissue-mice.html
- Canonical: https://groundlevelnews.com/story/scientists-are-growing-human-brain-tissue-in-living-mice-could-this-ma-81c833/

What happens when scientists start changing the brain—the very system through which an animal's mental states are expressed in behavior?

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