Shadow World | Science News

Support Science Journalism

Science News is a nonprofit.

Support us by subscribing now.


Feature

Shadow World

How many dimensions space has could all be a matter of perspective

By
1:43pm, November 13, 2007

In a school of thought that teaches the existence of extra dimensions, Juan Maldacena may at first sound a little out of place. String theory is physicists' still-tentative strategy for reconciling Einstein's theory of gravitation with quantum physics. Its premise is that the subatomic particles that roam our three-dimensional world are really infinitesimally thin strings vibrating in nine dimensions. According to Maldacena, however, the key to understanding string theory is not to add more dimensions but to cut their number down.

This article is only available to Science News subscribers. Already a subscriber? Log in now.
Or subscribe today for full access.

Get Science News headlines by e-mail.

More on General Relativity at 100

From the Nature Index Paid Content