# Scientists Grew an Electrode Inside a Living Brain. The Catalyst Was a Drop of Blood.

- slug: scientists-grew-an-electrode-inside-a-living-brain-the-catalyst-was-a-drop-of-blood
- date: 2026-04-13
- category: Biotech & Life Sciences

Purdue scientists grew electrodes inside living mouse brains using only a drop of the animals own blood — no surgery, no hardware insertion, just near-infrared light from outside the skull. The mice survived.

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