Issues

If neutron stars can be twice as massive as the Sun, most conjectures about exotic states of matter at maximum compression are ruled out.

Little is known about the thermodynamics of the familiar liquid’s metastable phases.

The as-yet-unexplained observation represents a crossover between astrophysical and atmospheric research.

Two experiments yield similar data but tell different stories about momentum transport at high Reynolds numbers.

At some wavelengths, the advantages of doing astronomy from Antarctica outweigh the challenges.

Scientific societies and advisers urge Congress to approve funding to restart production of the radioisotope, which provides the only alternative to solar power for spacecraft.

Businesses, nonprofit organizations, and the White House are betting on K–12 STEM teachers to forestall the “gathering storm” forecasted by the National Academies.

Bringing top scientists to Africa has a greater impact than sending individual African scientists abroad.

Infrared radiative transfer theory, one of the most productive physical theories of the past century, has unlocked myriad secrets of the universe including that of planetary temperature and the connection between global warming and greenhouse gases.

A marriage between superconductivity and ferromagnetism is opening the door for new spin-based applications.

MESSENGER spacecraft goes into orbit around Mercury in March 2011, but its three flybys have already offered a fresh perspective on the planet’s history, composition, and magnetic field.

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Weather reports and many scientific models treat rainfall as a continuous process, but to truly understand rain and its effects, one must consider its fundamentally discrete nature.