Scientists Unleash Franken-Mice With Brains That Are Nearly Half Human - futurism.com

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Scientists have created mice with brains that have millions of functioning human neurons fused into them. This groundbreaking feat could provide a new avenue for understanding and treating neurocognitive disorders, though the Frankenstein-esque nature of the work will surely raise ethical questions.

In a new study published in the journal Nature , the Stanford University scientists report how they used genetic engineering to deliberately create mice with parts of their brain missing — namely a key region called the cortex. By also stripping the mice of the ability to replenish these cortex neurons, this carved out a space that they could implant human brain cells.