They are both in this robot - researchers at Harvard's Wyss Institute have made a light-controlled stingray with a solid gold skeleton that moves using reconstituted rat muscles
This is a fascinating read:
- "robot" doesn't adequately capture the essence of the thing. Yet, despite containing living cells that must grow and feed, it's not quite an animal, either. Its creators went wild with the nomenclature: "tissue-engineered soft robotic ray," "biohybrid system," "artificial animal," and "bio-inspired swimming robot," none of which completely satisfies. "Biobot" - or maybe "growbot," since they're cultured, not assembled
