Today, virtual reality headsets are reaching the masses and can already let users dive into spectacular new worlds. From our couches, we can now float through space, fly over New York, or zip along roller coasters. But, what will it be like in the future?
See firsthand why London's Thames Barrier is no longer enough to keep the city safe from rising tides. The system has worked for decades, but due to increased environmental challenges, its location on a flood plain and heavy urbanization, London must now explore both low-tech fixes and some of the most advanced engineering solutions in the world.
Traditionally, regulators had insisted that all passenger aircraft be powered by at least three engines. But the development of more sophisticated airplanes eventually made twin-engine, long-distance travel feasible. A new standard was introduced, known as Extended-range Twin-engine Operational Performance Standards, or ETOPS.