What extremism is, how extremist ideologies are constructed, and why extremism can escalate into violence.

A concise history of GPS, from its military origins to its commercial applications and ubiquity in everyday life.

A concise history of spaceflight, from military rocketry through Sputnik, Apollo, robots in space, space culture, and human spaceflight today.

An introduction to computational thinking that traces a genealogy beginning centuries before the digital computer.

How the concept of critical thinking emerged, how it has been defined, and how critical thinking skills can be taught.

A comprehensive overview of developments in augmented reality, virtual reality, and mixed reality-and how they could affect every part of our lives.