Does Time Run Backward in Other Universes?


	Does Time Run Backward in Other Universes?

tabsey

5-22-2008 10:37 AM

128 views

tags:

astronomy, space, universes, time

tabsey says:

The intro to a very readable article. I like the reference to multiverse.

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<div style="margin: 12px 0px; font-family: arial; color: #333333; background: #ffffff; border: solid 4px #e5e5e5; width: 100%; clear: left;"><div class="CM_CTB_Content_Wrap" style="margin: 0px; padding: 0px;background-color: #ffffff;"><div style="border-bottom: solid 1px #dcdcdc; white-space: nowrap; margin-bottom: 8px; background-color: #eeeeee ;background-image: url(http://www.clipmarks.com/images/source-bg.gif); background-repeat: repeat-x; height: 24px; line-height: 24px; vertical-align: middle; padding-bottom: 4px; color: #666666; font-size: 10px;" ><a href="http://clipmarks.com/clip-to-blog/" title="see clips that are hot right now"><img src="http://content.clipmarks.com/blog_embed/a2554df5-4b85-4215-b90d-0c4d8baab432/AAD23ACD-DCF3-43E6-963E-F9D423A3E482/" alt="" width="19" height="19" border="0" style="vertical-align: middle; margin: 0px 4px; display: inline; border: none; float:none;" /></a>clipped from <a title="http://www.sciam.com/article.cfm?id=the-cosmic-origins-of-times-arrow&sc=rss" href="http://www.sciam.com/article.cfm?id=the-cosmic-origins-of-times-arrow&sc=rss" style="font-size: 11px;">www.sciam.com</a></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.sciam.com/article.cfm?id=the-cosmic-origins-of-times-arrow&sc=rss"><DIV class="key-concepts clearfix">
						<H3>Key Concepts</H3>
						<UL>
    <li style="margin-left:16px;padding-left: 0px;">The basic laws of physics work equally well forward or backward in time, yet we perceive time to move in one direction only—toward the future. Why?</LI>
    <li style="margin-left:16px;padding-left: 0px;">To account for it, we have to delve into the prehistory of the universe, to a time before the big bang.  Our universe may be part of a much larger multiverse, which as a whole is time-symmetric. Time may run backward in other universes.</LI>
</UL>
					</DIV></blockquote><div style="height: 2px; font-size: 2px; background: #dcdcdc; border-bottom: solid 1px #f5f5f5; margin: 2px 4px;"></div><blockquote style="text-align: left; padding: 0px 8px; margin: 4px 0px 8px 0px; background: transparent; border: none;" cite="http://www.sciam.com/article.cfm?id=the-cosmic-origins-of-times-arrow&sc=rss"><P>The universe does not look right. That may seem like a strange thing to say, given that cosmologists have very little standard for comparison. How do we know what the universe is supposed to look like? Nevertheless, over the years we have developed a strong intuition for what counts as “natural”—and the universe we see does not qualify.</P></blockquote></div><div style="margin: 0px 6px 6px 4px;"><table style="font-size: 11px;border-spacing: 0px;padding: 0px;" cellpadding="0" cellspacing="0" width="100%"><tr><td style="background:transparent;border-width:0px;padding:0px;">&nbsp;</td><td align="right" style="background:transparent;border-width:0px;padding:0px;width:107px" width="107"><a href="http://clipmarks.com/share/AAD23ACD-DCF3-43E6-963E-F9D423A3E482/blog/" title="blog or email this clip"><img src="http://content8.clipmarks.com/images/c2b-foot.png" border="0" alt="blog it" width="107" height="17" style="border-width:0px;padding:0px;margin:0px;" /></a></td></tr></table></div></div>

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