The Internet and Virtual Reality
Episode 35 of Redefining Reality

The Internet and Virtual Reality
Show More

Related videos

Ancient Computer
Part of the Series: NOVA
In 1900, a storm blew a boatload of sponge divers off course and forced them to take shelter by the tiny Mediterranean island of Antikythera. Diving the next day, they discovered a 2,000 year-old Greek shipwreck. Among the ship's cargo they hauled up was an unimpressive green lump of corroded…
Why Time Is a Mystery
Begin your study of the physics of time with these questions: What is a clock? What does it mean to say that "time passes"? What is the "arrow of time"? Then look at the concept of entropy and how it holds the key to the one-way direction of time in…
Time Travel
Use a simple analogy to understand how a time machine might work. Unlike movie scenarios featuring dematerializing and rematerializing, a real time machine would be a spaceship that moves through all the intervening points between two locations in spacetime. Also explore paradoxes of time travel.
History's Mysteries
Begin this journey by taking a closer look at concepts that were once unexplainable but are now better understood. You'll focus on two such former mysteries: the existence of an invisible "aether" through which light and sound were believed to travel and the orbit of Mercury, which seemed to violate…
Inexplicable Life
Join Professor Tyson on a fascinating investigation of the possible origins of life in the universe. Why was Jupiter believed to be a good environment for life in the 17th century? Why is there only one single "tree of life" on Earth instead of multiple ones? Could life have come…
Inexplicable Physics
Turn now to some inexplicable aspects of physics and our physical world. Among the many eye-opening topics you'll learn about in this episode are the discovery of more and more elements on the periodic table; muon neutrinos, tao particles, and the three regimes of matter; the secrets of string theory;…
Ghosts of Murdered Kings
Part of the Series: NOVA
In the rolling hills of Ireland's County Tipperary, a laborer harvesting peat from a dried-up bog spots the remnants of a corpse and stops his machine just in time, revealing a headless torso almost perfectly preserved and stained dark brown by the bog. Archeologists recognize the corpse as one of…
The Science of Healing
PBS
The Science of Healing follows Dr. Sternberg to a tiny village in Greece, where her personal experience of the power of place in healing inspired the research that led to this program. We join her as she explores ruins of ancient Greek healing temples, and visits cutting edge science labs…
Artificial Intelligence
Episode 34 of Redefining Reality
Trace the evolution of artificial intelligence (AI) from simple calculating machines to computers that can vanquish chess masters. Learn the distinction between weak AI, such as a chess-playing machine, and strong AI, which is a machine that has a truly human-like mind. Question whether strong AI is even possible.
Rise of the Drones
Part of the Series: NOVA
Drones. These unmanned flying robots-some as large as jumbo jets, others as small as birds-do things straight out of science fiction. Much of what it takes to get these robotic airplanes to fly, sense, and kill has remained secret. But now, with rare access to drone engineers and those who…
Cave of Crystals—Exquisite Caves
Focus on the spectacular shapes, such as stalagmites, stalactites, flowstones, and other cave features formed by minerals slowly precipitating from water. Then visit the recently discovered Cave of Crystals in Mexico, a science-fiction-like world with individual crystals up to 35 feet long.
Auroras—Light Shows on the Edge of Space
Investigate a stunning atmospheric phenomenon caused by events both inside Earth and in outer space. The shimmering colors of auroras result when particles from the solar wind are accelerated in Earth's magnetic field, which is generated by Earth's churning iron core.