Issues

The first measured hyperfine splitting in the heaviest of all meson families reveals the spin dependence of the force between bottom quarks.

Recent local measurements and numerical simulations constrain the possible mechanisms for glacial dynamics that occur on the time scale of minutes.

A decades-old theoretical prediction about random scattering has just received its first experimental confirmation.

In just two decades, scientific research in Hong Kong has been transformed from an underfunded pastime into a world-class enterprise.

But Congress could block the Bush administration’s plan to finance 10 commercial-scale CO₂ capture and storage projects at coal-fired power plants.

Neither of the huge telescopes spearheaded in the US is a sure bet, but project members say that for the country to remain internationally competitive in optical astronomy, both need to get built.

Despite the potentially catastrophic consequences of storm surges, the physics of surge generation and propagation has historically been poorly understood, and many misconceptions about surges still exist.

Uranium enrichment by centrifugation is the basis for the quick and efficient production of nuclear fuel—or nuclear weapons.

A combination of intellectual rigor, technical sophistication, hard work, and intelligence gathering brought China into the world’s nuclear club in record-shattering time.

After a tennis ball lands on the court, it slows down, spins up, and squashes. Friction on the ball can even reverse direction, pushing it forward.