My sister recently received caterpillars for her sixth birthday. The hungry caterpillars arrived in a jar with food, and we were able to observe them as they went through the different stages of their life cycle. A week after they arrived, the caterpillars became chrysalides, and underwent metamorphosis. Ten days later, they emerged as beautiful Painted Lady butterflies. We were in awe as we watched this amazing process occur before our eyes. Metamorphosis contains the Greek roots meta- meaning change and -morph meaning form. The suffix -osis means a process or condition. The roots and the suffix tell us that metamorphosis means “the process of changing form.” Animals that undergo metamorphosis are butterflies, moths, and frogs.