Invasive earthworms are known to dramatically alter the soil in North American forests. However, their impact on existing relationships in the soil food web is largely unknown. Scientists from the Forest Service, in collaboration with a visiting Chinese scholar, examined the effects of invasive earthworms on the relationship between predators (centipedes) and prey (springtails). They expected to find that invasive earthworms consumed leaf material, making it easier for centipedes to find springtails and thereby reducing the number of springtails. To accomplish this, the scientists experimentally manipulated combinations of invasive earthworms, centipedes, and springtails in the lab. To their surprise, the scientists found that the presence of invasive earthworms had a negative effect on springtails, but that the presence of centipedes did not. Furthermore, centipedes benefited when combined with earthworms alone. Together, these results suggest that invasive earthworms might hinder the abundance of springtails on the forest floor and that the invasive earthworms may represent a novel food source for centipedes in North American forests. These changes could alter other relationships in the soil food web and the soil processes in which they participate.