As people get older, "they just have this sense, this feeling that time is going faster than they are," says Warren Meck, a psychology professor at Duke University. This seems to be true across cultures, across time, all over the world. No one is sure where this feeling comes from. Scientists have theories, of course, and one of them is that when you experience something for the very first time, more details, more information gets stored in your memory. Think about your first kiss.
Time moves forward, not backward-everyone knows you can't unscramble an egg. In the hands of one of today's hottest young physicists, that simple fact of breakfast becomes a doorway to understanding the Big Bang, the universe, and other universes, too. In From Eternity to Here, Sean Carroll argues that the arrow of time, pointing resolutely from the past to the future, owes its existence to conditions before the Big Bang itself-a period modern cosmology of which Einstein never dreamed. Increasingly, though, physicists are going out into realms that make the theory of relativity seem like child's play. Carroll's scenario is not only elegant, it's laid out in the same easy-to- understand language that has made his group blog, Cosmic Variance, the most popular physics blog on the Net
If you prefer to get your talks about entropy unadulterated by voice and motion, and don’t mind a more technical presentation, I’ve put the slides from my recent Caltech colloquium online. These are aimed basically at grad students in physics, so there is an equation or two, and the caveats are spelled out more clearly. But the punchline is the same.
Entropy is the only quantity in the physical sciences that seems to imply a particular direction for time, sometimes called an arrow of time. As we go "forward" in time, the second law of thermodynamics states that the entropy of an isolated system tends to increase or remain the same; it will not decrease. Hence, from one perspective, entropy measurement is thought of as a kind of clock.
Prof Max Tegmark and Prof Brian Cox dicuss the fact that without the minus sign in spacetime, there would be no point in having a brain.
Perfect timekeeping has taken a step closer to reality after scientists developed a clock that loses just a second every 300 million years.
A team of physicists has claimed that our view of the early Universe may contain the signature of a time before the Big Bang.
Does time flow or lapse or pass? Are the future or the past as real as the present? These metaphysical questions have been debated for more than two millennia, with no resolution in sight. Modern physics provides us, however, with tools that enable us to sharpen these old questions and generate new arguments. Does the special theory of relativity, for example, show that there is no passage or that the future is as real as the present?
His paper rocked the physics world - and the space-time continuum. Not bad for a college dropout who critics say may not even exist.
Lynds' theory concerns the point at which the three tectonic plates of physics, maths and philosophy collide. It concerns time and motion, and how we think about them. Lynds says he started thinking about them when he was bored working in a dead-end job in insurance. "I've had an interest in time right through my life," he says. "But I didn't develop an interest in physics or the philosophy of science until I was about 19 or 20." His big idea, put simply, is that time cannot be thought of in physical, definable quantities. To the uninitiated that may seem obvious, but to some physicists it's heresy. Current thinking in quantum mechanics relies on time being made up of tiny, discrete packages - just like light and energy.
Our experience of time depends upon the growth of entropy. You can't imagine a person looking around and saying, "Time is flowing in the wrong direction," because your sense of time is due to entropy increasing. . . . This feeling that we're moving through time has to do with the fact that as we live, we feed on entropy. . . . Time exists without entropy, but entropy is what gives time its special character.
We do not really know what time is. What is the nature of its "flowing," the manner in which it creates changes and presents something new to the world? What forbids the world to be invariable or static for even a single instant (and, indeed, how would we know whether there were such durations in which the world remained invariable)? All we can do when speaking of the causes of changes, or of the "nature" of time, is to identify, or put into correspondence, the "flow" of time with some natural process (let us call it a "time reference") which is changing monotonically with respect to what we feel or understand as time. A mechanician would say that time is motion; an astrophysicist, that it is the expansion of the Universe; a thermodynamics researcher, that it is entropy growth; a biologist that it is life; an historian, that it is death; a psychologist, that it is consciousness...
It is becoming clear to me that the mystery of the nature of time is connected with other fundamental questions such as the nature of truth in mathematics and whether there must be timeless laws of nature. Rather than being an illusion, time may be the only aspect of our present understanding of nature that is not temporary and emergent
This review does a great job, in my opinion, of summing up what Science knows and doesn't know. "Science proved that the Universe does NOT revolve around the Earth. Well, it has also proven that it does NOT revolve around humans either. And since scientifically, we Humans are nothing special, how can we entertain the notion that Real is ONLY whatever we can grasp? That concept is pure theology at best - if not superstitious. "
There are two distinct views on the meaning of the word time. One view is that time is part of the fundamental structure of the universe, a dimension in which events occur in sequence, and time itself is something that can be measured. This is the realist's view, to which Sir Isaac Newton subscribed, and hence is sometimes referred to as Newtonian time.[1] A contrasting view is that time is part of the fundamental human intellectual structure (together with space and number) within which we sequence events, quantify the duration of events and the intervals between them, and compare the motions of objects.
So; Once again time does not exist. It is simply our mind applying an understandable framework to the progression of our consciousness through a series of static, overlapping, and simultaneously coexisting, multidimensional universes. The progression of our consciousness occurs in a linear, contiguous, and continuous fashion.
Lynds' work involves the subject of time. The main conclusion of his paper is that there is a necessary trade off of all precise physical magnitudes at a time, for their continuity over time. More specifically, that there is not an instant in time underlying an object's motion, and as its position is constantly changing over time, and as such, never determined, it also does not have a determined relative position.
We are finite beings in an infinite universe (as far as we know) and understanding the universe requires that we are able to measure the events and objects that make up the universe. Being able to control our physical environment by allocating and referring to time in ‘instants’ is a handy way of dealing with the problem.
Time has been studied by philosophers and scientists for 2,500 years, and thanks to this attention it is much better understood today. Nevertheless, many issues remain to be resolved.
"There isn't just one dimension of time," Itzhak Bars of the University of Southern California in Los Angeles tells New Scientist. "There are two. One whole dimension of time and another of space have until now gone entirely unnoticed by us."
Various theories of time travel and why they won't work.
Using the Quantum Loop Theory, a scientist attempts to model what came before the Big Bang.
