Issues

Three architects of LIGO are honored for their successful effort to directly detect gravitational waves.

Gravitational and electromagnetic radiation expose a merger that triggered a gamma-ray burst and manufactured heavy elements.

Proteins frozen in vitreous ice are now being imaged with atomic resolution.

The space agency views reactors as options both for propulsion to Mars and as a power source for life on the red planet.

The cement-based layer can be applied to nonstructural masonry walls to make them bend rather than break.

A density pattern created by acoustic waves in the early universe can be seen in the distribution of galaxies and used as a standard ruler with which to measure cosmological expansion.

Suspensions of metallic nanoparticles can harvest valuable heat from sunlight that would otherwise go to waste in a photovoltaic cell.

Six decades after the belts’ discovery in 1958, scientists are still finding mysterious features.

The stars and planets move not on a flat surface but on the celestial sphere. So ordinary plane trigonometry isn’t adequate to describe their motion.