As of now, string theorists have no explanation of why there are three large dimensions as well as time, and the other dimensions are microscopic. Proposals about that have been all over the map.
quote by Edward Witten

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Changing Dimensions Seen
Changing dimensions seen.
No retracting to step back.
Changing dimensions seen.
The past is gone and that's a fact.
Changing dimensions seen.
Changing dimensions seen.
A consciousness has been uplifted.
Changing dimensions seen.
And gone are all those flaws abhorred.
Changing dimensions seen.
Those bigoted with prejudice...
Find they've been dismissed.
And...
Changing dimensions seen.
Changing dimensions seen.
People sharing with a caring.
Changing dimensions seen.
And racists are considered sick.
Changing dimensions seen.
Changing dimensions seen.
A consciousness has been uplifted.
Changing dimensions seen.
And gone are all those flaws abhorred.
Changing dimensions seen.
Those bigoted with prejudice...
Find they've been dismissed and quick!
Changing dimensions seen.
Changing dimensions seen.
And...
No retracting to step back.
Changing dimensions seen.
The past is gone and that's a fact.
Changing dimensions seen.
That peace resisted over-rules,
And those who cling to hate are fools.
Changing dimensions seen.
And...
Changing dimensions seen.
And...
Changing dimensions seen.
poem by Lawrence S. Pertillar

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The theory has to be interpreted that extra dimensions beyond the ordinary four dimensions the three spatial dimensions plus time are sufficiently small that they haven't been observed yet.
quote by Edward Witten

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Technically you need the extra dimensions. At first people didn't like them too much, but they've got a big benefit, which is that the ability of string theory to describe all the elementary particles and their forces along with gravity depends on using the extra dimensions.
quote by Edward Witten

Submitted by Lucian Velea
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Dimensions Blending
Dimensions blending.
With a mind bending intending,
New beginnings.
Dimensions blending.
With a mind bending intending,
New beginnings.
And witnessed are dimensions blending in!
Dimensions blending.
With an ending of those limits,
Once defended.
Now seen suspended.
Limits departing.
Limits departing...
As dimensions once unmentioned,
Drop those chins!
And witnessed are dimensions blending in!
Limits departing.
Limits departing...
As dimensions once unmentioned,
Drop those chins!
Dimensions blending.
With a mind bending intending,
New beginnings.
And witnessed are dimensions blending in!
Limits departing.
And,
Witnessed are dimensions blending in!
Limits departing.
And,
Witnessed are dimensions blending in!
Dimensions blending.
And,
Witnessed are dimensions blending in!
Dimensions blending!
poem by Lawrence S. Pertillar

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Connected (Love & Life Poem)
We are connected to this life by many threads
Which we only notice when they are broken
Whether family, friends, work or welfare, all
Pull us apart in different dimensions in time.
You are connected to me by small pleasures
Which we only notice when we stop giving
Whether interest, intent, wish or wisdom, all
Pull us apart in different dimensions in space.
We are connected to each other for ever now
Which we only notice when we are apart again
Whether travel, trust, freedom or failure, all
Pull us apart in different dimensions in love.
poem by Ian Beckett

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As you say, the way string theory requires all these extra dimensions and this comes from certain consistency requirements about how string should behave and so on.
quote by Roger Penrose

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All dimensions are critical dimensions, otherwise why are they there?
quote by Russ Zandbergen

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To the Committee of the Cayley Portrait Fund
O wretched race of men, to space confined!
What honour can ye pay to him, whose mind
To that which lies beyond hath penetrated?
The symbols he bath formed shall sound his praise,
And lead him on through unimagined ways
To conquests new, in worlds not yet created.
First, ye Determinants! in ordered row
And massive column ranged, before him go,
To form a phalanx for his safe protection.
Ye powers of the nth roots of — 1!
Around his head in ceaseless cycles run,
As unembodied spirits of direction.
And you, ye undevelopable scrolls!
Above the host wave your emblazoned rolls,
Ruled for the record of his bright inventions.
Ye Cubic surfaces! by threes and nines
Draw round his camp your seven-and-twenty lines—
The seal of Solomon in three dimensions.
March on, symbolic host! with step sublime,
Up to the flaming bounds of Space and Time!
There pause, until by Dickenson depicted,
In two dimensions, we the form may trace
Of him whose soul, too large for vulgar space,
In n dimensions flourished unrestricted.
poem by James Clerk Maxwell

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The older I get, the more I realize the importance of exercising the various dimensions of my body, soul, mind and heart. Taken together, these aspects give me a sense of wholeness. I want to be a whole human being rather than one who limps on one leg because I don't know how to use all of my parts. Intellectual, emotional, and physical activity are not separate entities. Rather, they are dimensions of the same human being.
quote by Robert Fulghum

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According to String Theory, what appears to be empty space is actually a tumultuous ocean of strings vibrating at the precise frequencies that create the 4 dimensions you and I call height, width, depth and time.
quote by Roy H. Williams

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Having those extra dimensions and therefore many ways the string can vibrate in many different directions turns out to be the key to being able to describe all the particles that we see.
quote by Edward Witten

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As far as extra dimensions are concerned, very tiny extra dimensions wouldn't be perceived in everyday life, just as atoms aren't: we see many atoms together but we don't see atoms individually.
quote by Edward Witten

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Mirror
there is the mirror
it holds three dimensions
but can show you only one
there is the man in the mirror
he holds a rainbow of dimensions
but can show you only five
poem by John Tiong Chunghoo

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Surreality
Empty space, time and dimensions
A place Where clocks have no value
and time no meaning
A place in the mind
with no geographical measures and bonds
The province of fools
and those seeking redemption
Too much explanation,
too much rationalization,
And the world of empty ambition
from which there’s no rest
A place of chaos, confusion and panic
In the roseate brilliance from fiery forges
Or dim lit sky… bisected by silhouettes of birds
Where the pull of a thread
Unravels the sweater
And chains chatter coldly
Upon hollow flagpole
Where sands are etched in hieroglyphs
By footprints and talons
And smiles are as brittle as broom straws.
Wherein your pulse is akin
To the sound of a kettledrum
A drear place where sharks circle
With cold patient eyes
And the music is the creaking
Of weather bleached windmills
Tilted in terminal space
Of shadows pooled in dark, dank places
And lights, like both blades of razors, and
Glows of candles in graveyards at night
Slick pools of greasy mirages,
Places of light smudged with fog
Empty spaces….Endless time
Infinite dimensions…
…of time and spaces…
poem by David Whalen

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Love in Three Dimensions (Love Poem)
We miss the body language in our telephone conversation,
Feelings expressed unseen, words of love are just words,
We laugh but fear the loneliness of an unintended slight,
Connected and divided by one dimension in time and space.
We hear and see without feeling on a nervous video chat,
Expressing our nakedness as Adam and Eve in the garden,
Deprived of touch words and pictures are distant and awful,
Connected and divided by two dimensions in time and space.
We hold each other in the tender embrace of long absence,
Whispered intimacies and smiling eyes together at last,
Contemplation of heaven and a hell that was missing you,
Connected you, a part of me, in three dimensions time and space.
poem by Ian Beckett

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Paradigm Zone
There's nothing left to be said,
So let's leave it!
A consciousness missing,
Can not be knocked...
Into the head,
Of one whose thought process has stopped,
Been blocked, stiffled or dead!
A waste of time occurs instead!
If a shallowness is groomed...
Room for depthness
Has long been shed.
So even if those wishes are shown,
We must gather those feelings
Inside of us condoned.
And hopefully a thought to think
Will begin to sink
Into others left alone.
Merging are dimensions...
As an intention,
To grasp our attention.
Merging
Merging
Dimensions into one.
This spellbinding parallel
Of that which is unknown...
Merging into one dimension quick.
Breaking down our conditioned concepts...
In a paradigm zone that shifts.
poem by Lawrence S. Pertillar

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Jesus Came To Show Us How To Live
Jesus didn’t come to die for us,
he came to show us how to live.
There is no devil in our head,
it is the ego, it takes instead of gives.
We can think for ourselves we don’t need
a preacher to tell us how,
we can be like the animals, we can live in the now.
In other dimensions they use telepathy,
they don’t have Bibles to read.
Many mansions Jesus spoke of is
“many dimensions” which means
there is more than one heaven.
We make our heaven or hell on Earth,
so lets celebrate our Godselves and
realize we are all Saints,
we just don't know our own worth for Heaven Sakes.
Written By Christina Sunrise on December 7,2011
poem by Christina Sunrise

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Craddock’s Time Theory Age Relative
light years apart
in space time
continuum
youth three-dimensional
stretching into mathematical models
age a fourth dimension
spatial dimensions
our spacetime passing each other
is space and time in a single continuum
our shared Euclidean space
on this plane of existence
is but the trap of physical flesh
our atoms bound at every point
in three-dimensional Euclidean space
by flesh infused fixed points
determined by three coordinates
yet our thoughts are timeless
infinite bound by no scientific laws
they can flow spread be anywhere any time
in universe at instant thought speed
instant in arrival at multiple locations
they enter into realities past curved space
worn holes are for porous slow minds
higher dimensions bypass imagination
non-Euclidean geometry the cage play pen
Einstein’s general theory of relativity
a manifold universe of but three
dimensions of space one of time
denies all time existing simultaneously
within a God state span spun within eternity
supergalatic subatomic levels are but focused lenses
begging new observations into eye opening realities
unperceived ignored unknown awaiting perception orientation
before eureka moment God reloading reality matrix
poem by Terence George Craddock

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spatial dimensions,
infinity implies change
thus creating time.
haiku by Diane Hine

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Invisible Particles
I care less,
walking on plateau.
Now,
mind rejects the peaks.
A small patch of green,
I knead on ice
of firm orbs.
This sterile landscape starts a fire.
My hands knit a taciturn probe
to enter the inconceivable.
The particles sleep in metaphors
of a baked sky,
where the stars bleed every night.
The fear looms large.
I sit in the crevices of hurts
to reduce the dimensions of time.
poem by Satish Verma

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