The Habitat supports the passage of time, offering seasons and day/night cycles, and as such the creatures age and have a limited life span, which can be cut short if they are unable to survive their Habitat. A well adapted creature will be able to find food, avoid predators and, when the time is right, even breed. The offspring take a random combination of their parents genetics which, due to the 'survival of the fittest' philosophy of the game, should ensure they are better suited to their world than the previous generation.