From "Miracles of Human Language: An Introduction to Linguistics" by Marc van Oostendorp, Leiden University. See the course description https://www.coursera.org/course/humanlanguage :

"Everywhere, every day, everybody uses language. There is no human society, no matter how small or how isolated, which does not employ a language that is rich and diverse. This course introduces you to linguistics, featuring interviews with well-known linguists and with speakers of many different languages. Join us to explore the miracles of human language! (...)"

Week 0 - Welcome to the course!