1. For a long time, people have been curious about how we aquire language. 2. One theory is that we must have a model from which to pattern our language. 3. For example, how babies imitate their parents, siblings, and caregivers. 4. Demonstrating the truth of any theory of language has been difficult. 5. However, two young twins who invented their own language and amazed everyone. 6. At first researchers believed that the twins were only babbling and could not understand one another. 7. Although researchers soon realized that the two girls were really communicating. 8. Their language was a true language. 9. In the absence of contact with any adult language, the two young girls had created their own language system. 10. Causing reasearchers to reevaluate how people learn language.