Do animals have culture? The orangutans of Sumatra certainly do. They've learned how to fish honey out of tiny termite nests, and to scoop the pulpy food out of razor-sharp fruits. What's more, they've passed on this knowledge to their offspring. Now, scientists think these primates may offer insights into our own cultural evolution. In this hour of To the Best of Our Knowledge, what the other primates reveal about ourselves. And, what really happened to the Neanderthals.