Why have humans not altered our bodies so we can photosynthesise? It's easy to imagine how much our way of life would change if we could do so. Would we eat less, rest more, reduce our damage to the environment, perhaps even live longer? The Enhancement collection of short stories considers what life would be like if we drew energy directly from sunlight. Stories range from the domestic life of new parents raising a child with this ability through to a squad of soldiers who rarely need to eat and have lost the need to sleep. An Australian university student starts the world down this path by taking the algae that lives inside corals and implanting it into human skin cells.