See allHide authors and affiliations

Science  07 Jan 2000:
Vol. 287, Issue 5450, pp. 49-50
DOI: 10.1126/science.287.5450.49

You are currently viewing the summary.

View Full Text

Log in to view the full text

Log in through your institution

Log in through your institution


According to some of the most audacious ideas yet seen in the field of gravity research, our familiar three-dimensional expanding universe can be viewed as a sheet or domain wall, called a "3-brane", that moves in a higher-dimensional space-time which may turn out to be truly gigantic. The jury is still out on whether the idea really works, but some spectacular advances in string theory have made these once apparently preposterous ideas seem quite natural.