The Vacanti mouse was a laboratory mouse (circa 1996) that had what looked like a human ear grown on its back. The "ear" was actually an ear-shaped cartilage structure grown by seeding cow knee cartilage cells into biodegradable ear-shaped mold and then implanted under the skin of the mouse, with an external ear-shaped splint to maintain the desired shape.
The Vacanti mouse was a laboratory mouse (circa 1996) that had what looked like a human ear grown on its back. The "ear" was actually an ear-shaped cartilage structure grown by seeding cow knee cartilage cells into biodegradable ear-shaped mold and then implanted under the skin of the mouse, with an external ear-shaped splint to maintain the desired shape.
Source: Wikipedia "Vacanti mouse" · CC BY-SA 4.0
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