THE FABRIC OF THE COSMOS: THE ILLUSION OF TIME
Time. We waste it, save it, kill it, make it. The world runs on it. Yet ask physicists what time actually is, and the answer might shock you: They have no idea. Even more surprising, the deep sense we have of time passing from present to past may be nothing more than an illusion. How can our understanding of something so familiar be so wrong? In search of answers, Brian Greene takes us on the ultimate time-traveling adventure, hurtling 50 years into the future before stepping into a wormhole to travel back to the past. Along the way, he will reveal a new way of thinking about time in which moments past, present, and futurefrom the reign of T. rex to the birth of your great-great-grandchildrenexist all at once. This journey will bring us all the way back to the Big Bang, where physicists think the ultimate secrets of time may be hidden. You'll never look at your wristwatch the same way again.
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THE FABRIC OF THE COSMOS: THE ILLUSION OF TIME - YouTube
The Fabric of the Cosmos: What Is Space?
Surprising clues indicate that space is very much something and not nothing.
The Fabric of the Cosmos
Acclaimed physicist Brian Greene reveals a mind-boggling reality beneath the surface of our everyday world
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The Fabric of the Cosmos: What Is Space? - YouTube
"In
cosmology, the concept of spacetime combines space and time to a single abstract
universe. Mathematically it is a
manifold consisting of "events" which are described by some type of
coordinate system. Typically three spatial dimensions (length, width, height), and one temporal dimension (
time) are required. Dimensions are independent components of a coordinate grid needed to locate a point in a certain defined "space". For example, on the globe the
latitude and
longitude are two independent coordinates which together uniquely determine a location. In spacetime, a coordinate grid that spans the 3+1 dimensions locates
events (rather than just points in space), i.e. time is added as another dimension to the coordinate grid. This way the coordinates specify
where and
when events occur."
Spacetime - Wikipedia, the free encyclopedia