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Features

The Search for Relativity Violations

To uncover evidence for an ultimate theory, scientists are looking for infractions of Einstein's once sacrosanct physical principle

By Alan Kosteleck

Solving the Solar Neutrino Problem

The Sudbury Neutrino Observatory has solved a 30-year-old mystery by showing that neutrinos from the sun change species en route to the earth

By Arthur B. McDonald, David L. Wark and Joshua R. Klein

The Mysteries of Mass

Physicists are hunting for an elusive particle that would reveal the presence of a new kind of field that permeates all of reality. Finding that Higgs field will give us a more complete understanding about how the universe works...

By Gordon Kane

The String Theory Landscape

The theory of strings predicts that the universe might occupy one random "valley" out of a virtually infinite selection of valleys in a vast landscape of possibilities

By Joseph Polchinski and Raphael Bousso

Atoms of Space and Time

We perceive space and time to be continuous, but if the amazing theory of loop quantum gravity is correct, they actually come in discrete pieces

By Lee Smolin

A Cosmic Conundrum

A new incarnation of Einstein's cosmological constant may point the way beyond general relativity

By Lawrence M. Krauss and Michael S. Turner

That Mysterious Flow

From the fixed past to the tangible present to the undecided future, it feels as though time flows inexorably on. But that is an illusion

By Paul Davies

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