What is time? What makes things age?
612415
Time is currently one of the few fundamental quantities. These are quantities which can not be defined via other quantities because there is nothing more fundamental known at present. Thus, similar to definition of other fundamental quantities (like space and mass), time is defined via measurement. Currently, the standard time interval (called conventional second, or simply second) is defined as 9 192 631 770 oscillations of a hyperfine transition in the 133caesium (Cs) atom.\n\nThis definition of time coupled to the current definition of space in physics makes our space-time to be Minkowski space-time - and thus makes special relativity absolutely correct simply by definition.\n\nPrior to Albert Einstein's relativistic physics, time and space had been treated as distinct dimensions; Einstein linked time and space into spacetime. He said that time was basically what a clock reads; the clock can be any action or change, like the movement of the sun. Einstein showed that people traveling at different speeds will measure different times for events and different distances between objects, though these differences are minute unless one is traveling at a speed close to that of light. Many subatomic particles exist for only a fixed fraction of a second in a lab relatively at rest, but some that travel close to the speed of light can be measured to travel further and survive longer than expected (a muon is one example). According to the special theory of relativity, in the high-speed particle's frame of reference, it exists for the same amount of time as usual, and the distance it travels in that time is what would be expected for that velocity. Relative to a frame of reference at rest, time seems to "slow down" for the particle. Relative to the high-speed particle, distances seems to shorten. Even in Newtonian terms time may be considered the fourth dimension of motion; but Einstein showed how both temporal and spatial dimensions can be altered (or "warped") by high-speed motion.\n\nEinstein (The Meaning Of Relativity): "Two events taking place at the points A and B of a system K are simultaneous if they appear at the same instant when observed from the middle point, M, of the interval AB. Time is then defined as the ensemble of the indications of similar clocks, at rest relatively to K, which register the same simultaneously."
241342
I agree with flandargo. The basic quantities mass, length and time and in elecricity the quantity charge cannot be difined.\nThese are all concepts understood by intution. We can define their units.\n\nSome may define that 'time is the interval between two events'.  But the question is what is interval.\n\nSimilarly mass is defined by some as quantity of matter.\nThe question is .'what is matter' \n\nHence Time cannot be defined.
222990
As time goes on\nAs time went on\nLater on\nEventually
417984
As Einstein said you get time contraptions if you move at a speed aproaching the speed of light. For you time moves faster. You move a year with a speed close to the speed of light and when you stop everyone will be 7  years older and you've spent only one year. The problem is...what if you don't like the future....there is no way to go back in time..
780880
The trouble is that any answer to that question is guess work at best.\n\nWhether that guess is based on scientific observation or pure mythology or religion...  It's still pure guess work and any one answer is as valid as the next...\n\nBased on the fact that the passage of time is variable dependant upon the effects of Gravity and/or Speed...  Every answer is true.\n\nFor the passage of time in a Gravity free vacuum, the universe infinitely old...  For the passage of time for the very first photon released - The Universe is only moments old.\n\nIf we look at the physical evidence and declare that it would have taken 16 billion years for this, or that...  We are talking about the time experienced by those things...  But that measurement is no more valid than the mere momments of the photon or the infinite eternity of the vacuum...\n\nNo...  The truest answer I can give you is this...  The universe you live in came into existence at the momment of your creation.  So it's aproximately nine monthes older than your age, but it was created with all the appearences of having existed previously...
1045387
GOOD QUESTION: well done! There is not really any such thing as time, it is merely our way of describing a particular abstract concept. If it was a solid physical reality it surely couldn't be relative. Lets all go and read Einstein and try to figure it out!
731118
Time is a human concept and merely memories strung together.
1076410
Ageing or aging is the process of getting older. Ageing is an important part of all human societies reflecting the biological changes that occur, but also reflecting cultural and societal conventions.Age is usually, but wholly arbitrarily, measured in years and a person's birthday is often an important event. \n\nand if you are interested scientifically how it happens, may following link help you.\n\nhttp://www.chem-tox.com/DNA/aging.htm\n\ncheers!!!
949405
Judge for yourself based on this: Time is a MAN MADE construction. That is, it is not a natural element in life. For those of you who would argue, please answer how it can be set back and set forward (daylight's saving time). If it were natural you wouldn't be able to limit it to the watches you wear or the clocks on the wall. It would be beyond any human control and it would be very hard for anyone to grasp the concept and explain it. As it is, we CAN explain it and grasp it, therefore, it is not natural.\n\nSo my answer is no.\n\n\n\n\n\n\n\n\n\n\n.
105239
Do you want to know about linear time, or the decay of lifeforms over time?\n\nPeople turn different ages because it's the only way we know. tomorrow is after today. \n\nI don't turn different ages though, I get older.
877492
What is old to you is not to them. Some of it is priceless.\nWhen you get older you begin to value certain things more than when your young.
89468
Ya Time is just a measure of change... If there is change then you can say that there is time... No-time isn't a "theory" it's an idea, a thought game.
1113546
Time is really comprehended in terms of the individual. Since we all interpret time in about the same way, based on 24 hour earth rotations and 75 year life spans, then we all share the same concept of time. If days lasted 400 hours and people lived 1000 years, then we would all have the same perception of time only it would be different from the way we perceive it now. Time is perfectly comprehend-able and that's why we have terms like the ones you mentioned... it's just relative.
533362
The first thing I, you or anyone else attempting this problem would have to do is come up with a concrete, working definition of Time.  No one knows precisely what it is, much as we talk about it and around it.  Not even Einstein, nor any of hi contemporaries.  We haven't really progressed on that score even now some 90 years later.  Looking at the work by Weinberg, Aharonov, Bondi, Witten, Schroedinger, Penrose, Hawking, or Minkowski.  All of whom are among the foremost of experts in the fields of Time, Relativity, Structure of the Universe.  If you can't define Time in such a fashion as you can then begin to see a means by which to manipulate time, you'll never get anywhere.  Then of course are the forces needed to accomplish that manipulation, what are they?  How do they operate?  How do we recognize them and harness them for use?\n     Nothing is so simple as the machine and concept envisioned by H.G. Wells in "The Time Machine".  The concept of time travel is an awesome thought, that it was as easy as the machine he described was just simplistic.\n     Bottom line, at this point in our history and on into our near future, it will not happen.  Sorry.
70901
The phrase is what's called an "idiom." It's a phrase that doesn't really translate into another language and can't really be defined.\n\nAt any rate, an "age" is just an extended period of time, which could be weeks, months, or longer.
706869
There are no terms for that.  Time is artificial. You can use whatever you want.  I would say "our clocks".
312203
How can time be fast?  Speed is defined as how far something moves in a given amount *of* time.  Time doesn't move, it just is.  It's like asking which is taller, the Empire State Building, or height?