Issues

An effect known as photophoresis sends carbon-coated microspheres traveling unprecedented distances inside a beam of light.

When applied to random nodes in a network, the statement “Your friends have more friends than you do” has predictive power.

Recent results highlight the precision reached by the latest optical clocks.

The public and private sectors are recognizing that in casting a wide net and paying only for success, incentive prizes have the potential to spur breakthroughs

Three biomedical research projects are selected to fly on the International Space Station, but NASA can’t say when

Quantum mechanics allows one to independently select both the initial and final states of a single system. Such pre- and postselection reveals novel effects that challenge our ideas about what time is and how it flows.

As synthesis techniques mature, BN nanotubes are likely to be increasingly valuable in fundamental physics studies and find application in a variety of forms—from dyeable, neutron-absorbing fabrics to high-temperature catalysts and photovoltaic devices.

Although string theory is formulated in 10 or 11 dimensions, specific string theory solutions make unambiguous, testable predictions about our four-dimensional universe.

Ubiquitous features of particle collections whose individual elements are locked in place have inspired physicists to search for general principles that describe random packing.