Issues

The dust’s IR spectrum bears the signatures of crustal material that has been melted, vaporized, and blasted into space.

Microscopic features on a wall can have an enormous influence on macroscopic flows along it.

Stiff new competition from security applications for a limited supply of helium-3 threatens research in low-temperature physics, neutron scattering, and medicine, for example.

The laboratory-directed R&D program is a bright spot in a bleak outlook for nuclear weapons R&D.

The LHC will run at reduced energy until its superconducting magnets are retrained and the connections between them fixed.

Shampoos, paints, cements, and soft body armor that stiffens under impact are just a few of the materials whose rheology is due to the change in viscosity that occurs when colloidal fluids experience shear stress.

Laszlo Tisza’s contributions to our understanding of superfluid helium are often overshadowed by Lev Landau’s, but Tisza’s insights are still paying dividends—and not just for helium.

A national study of teaching and learning in courses that introduce astronomy to nonscience majors shows that interactive learning strategies can significantly improve student understanding of core concepts in astrophysics.

In a reference frame fixed to the solar system’s center of mass, a satellite’s energy will change as it is deflected by a planet. But a number of satellites flying by Earth have also experienced energy changes in the Earth-centered frame—and that’s a mystery.