Issues

Metallic hydrogen has been a major goal for several generations of physicists. Now evidence suggests that this lightest of metals has been realized, but in an unexpected form.

Measuring the Hubble constant with supernovae continues to suggest an older universe than one gets with other yardsticks.

Ten years after a natural disaster in Cameroon killed 1746 people, a new model adds support to the hypothesis that the culprit was a previously unknown type of nonvolcanic eruption.

Believing that less is more, many researchers are trying to create quantum‐dot, or zero‐dimensional, lasers.

Continuing the lunar orbit's 300‐year role as gravity's testing ground, laser ranging to the Moon precisely confirms the foundations and structure of general relativity.

Having met at a Solvay conference in 1933, the discoverer of the neutron and the inventor of the cyclotron carried on a lively correspondence in the late 1930s. The next time they met was in 1943, on the Manhattan Project.

Low‐dimensional metals with moving lattice modulations display a host of unusual properties, including gigantic dielectric constants and the ability to ‘remember’ electrical pulse lengths.