This document provides an overview of learning in the 21st century. It discusses how learning often happens spontaneously and unconsciously as people adapt to new environments. Collective learning allows groups to have huge impacts on their environments, as seen with the development of Wikipedia. It also discusses the interdisciplinary field of learning sciences and how digital spaces like online games can be studied from various perspectives to understand learning. The document focuses on a positive perspective of new technologies and their potential, rather than just exploring dystopian views.