Issues

It’s probably too late to save the West Antarctic glaciers. And East Antarctica’s situation is unexpectedly precarious.

Femtosecond electron bunches extracted from a laser-cooled gas cloud could become a powerful tool for macromolecular studies.

The toxic element leached out of pipes into the water and left its record in harbor sediments.

A consensus emerges on which exciting opportunities to pursue under tight budgets.

High-power radio and microwave beams join cost-effective, solid-state lasers on US military’s horizon.

Lawmakers reject the Obama administration’s plan to suspend construction of a South Carolina plant for fabricating mixed-oxide nuclear fuel.

Three decades of careful experimentation have painted a surprisingly hazy picture of the constant governing the most familiar force on Earth.

The universally accepted method of expressing physical measurements for world commerce, industry, and science is about to get a facelift, thanks to our improved knowledge of fundamental constants.

In the 30 years since the ozone hole was discovered, our understanding of the polar atmosphere has become much more complete. The worldwide response to the discovery was fast, but the recovery is slow.

Two lobes emanating from the galactic plane may have been created when the supermassive black hole at the center of the galaxy was more active than it is today.