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Old May 9, 2008, 11:14 am   #36 (permalink) (top)
Rainbow
Volcanic Erupter
 
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Update

Quote:
Immense detectors surround the areas where inconceivably small particles slam into one another at super-high energies, collisions that may confirm Arkani-Hamed's predictions about undiscovered properties of nature.

The accelerator, estimated to cost between $5 billion and $10 billion, could provide answers to questions physicists have had for decades. Thousands of scientists from around the world are collaborating on the project at the European Organization for Nuclear Research, or CERN.

Arkani-Hamed has had a hand in explaining how the world can operate according to Einstein's theory of general relativity, which describes the universe on a very large scale, and at the same time follow quantum mechanics, laws that describe the universe on a scale smaller than the eye can see.

For example, if you are driving a car, your GPS tells you where you are, and your speedometer tells you how fast you are moving. But on the scale of particles like electrons, it is impossible to know both position and speed at once -- the very act of trying to find out requires incredible amounts of energy.

A theory that has emerged in recent decades that claims to bring some relief to physics mysteries like these is called superstring theory, or string theory for short. While previously, scientists believed that the smallest, most indivisible building blocks of our world were particles, string theory says that the world is made of extremely small vibrating loops called strings.

In order for these strings to properly constitute our universe, they must vibrate in 11 dimensions, scientists say. Everyone observes three spatial dimensions and one for time, but theoretical models suggest at least seven others that we do not see.

String theory has come under attack because some say it can never be tested -- the strings are supposed to be smaller than any particle ever detected, after all. But Arkani-Hamed says the Large Hadron Collider could potentially lead to the direct observation of strings, or at least indirect evidence of their existence.
Link :
Colliding with nature's best-kept secrets - CNN.com

Where the Energy comes from, guys ? :-)
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