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The Universe's Unseen Dimensions

The visible universe could lie on a membrane floating within a higher-dimensional space. The extra dimensions would help unify the forces of nature and could contain parallel universes

By Nima Arkani-Hamed, Savas Dimopoulos and Georgi Dvali

Form from Fire

Self-propagating heat waves can engender new and improved materials, but only recently have researchers found ways to monitor these ultraquick chemical reactions

By Arvind Varma

Is Global Warming Harmful to Health?

Computer models indicate that many diseases will surge as the earth¿s atmosphere heats up. Signs of the predicted troubles have begun to appear.

By Paul R. Epstein

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