Issues

There are far fewer small bodies in the solar system’s outer reaches than there would be if collisions were common.

Paper-thin electronics measure heart rate, blood flow, and more—and could save children’s lives.

High-speed scanning tunneling microscopy reveals recently identified atomic movements that hasten diffusion.

The behavior of a one-dimensional gas of ultracold atoms confirms a generalized theory.

As one company brings a hydrogen-carrying fuel to market, researchers focus on ammonia as an optimal storage compound for export.

More advanced estimates of atmospheric conditions depend on merging the knowledge gained from humans and computers.

A mysterious object led two physicists to investigate the German quest and failure to build a working nuclear reactor during World War II.

Microscopic self-propelled particles could one day be used to clean up wastewater or deliver drugs in the body.

Whereas previous discoveries of superconductors were largely serendipitous, the latest advances have emerged from the close coupling of theoretical predictions and high-pressure experiments.

Watery air bubbles covered with bacteria or viruses can live far longer than uncontaminated ones. And on bursting, they spawn orders of magnitude more droplets, each one a microbial grenade.