Orangutans are animals that are similar to humans in many ways. One similarity is their ability to communicate through language. This ability is being studied in a program at a zoo in Washington, D.C. What is the purpose of this program? How does it work?
Welcome the sights and sounds of the world with the Footprint Reading Library. This content-based reading series presents fascinating real-world stories in three formats: print, audio, and video from National Geographi... more