Female Soil Mite (IMAGE) Umea University Caption Researchers found significant genetically transmitted changes in laboratory populations of soil mites in just 15 generations leading to a doubling of the age at which the mites reached adulthood and large changes in population size. Credit © Dr. Tom Cameron Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.