W
weeman
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http://www.msnbc.msn.com/id/13816702/<br /><br />This article is from last year, but I found it to be interesting.<br /><br />Is it possible that universal constants, like the speed of light, have not always been the same constant that they are today?<br /><br />Do Einstein's theories negate this fact that light has not always been the same speed?<br /><br />Some scientists say that many of Einstein's theories would be completely wrong if this idea of the inconstant constants is correct. However, other scientists say that it all comes down to the physics on a subatomic level. It may all depend on whether or not string theory is correct. <br /><br /><font color="yellow"> "A popular alternative to relativity, which assumes that sub-atomic particles are vibrating strings and that the universe has 10 or more spatial dimensions, actually predicts inconstant constants. <br /><br />According to this string theory, the extra dimensions are hidden from us, but the "true" constants of nature are defined on all dimensions. Therefore, if the hidden dimensions expand or contract, we will notice this as a variation in our "local" 3D constants." </font><br /> <div class="Discussion_UserSignature"> <p> </p><p><strong><font color="#ff0000">Techies: We do it in the dark. </font></strong></p><p><font color="#0000ff"><strong>"Put your hand on a stove for a minute and it seems like an hour. Sit with that special girl for an hour and it seems like a minute. That's relativity.</strong><strong>" -Albert Einstein </strong></font></p> </div>