World's first living robots can now reproduce

The world’s first living robots, created from frog cells, self-replicate by pushing loose cells together. The Pac-Man-shaped blobs are made up of stem cells removed from frog embryos, which naturally cohere and develop hair-like protuberances called cilia. In a dish, they can move around and push loose stem cells into piles with their ‘mouths’. These piles can then develop into ciliated ‘offspring’, and go on to build their own pile-of-stem-cell babies.