Looking for a way to improve the xenobots" performance further, Blackiston and his team asked the AI to come up with an improved design. The AI blueprint produced Pacman-shaped xenobots with indentations that look like mouths. This third generation had a further surprise: by gathering hundreds of stem-cells in their "mouths" they could mould new xenobots (as shown in the image at the top of this page). They had, in other words, evolved an entirely new way to reproduce, unlike anything seen elsewhere in nature.