In a new twist to the puzzle of how life developed from only left-handed amino acids, researchers have found that the common mineral calcite can segregate the molecules into their left-handed and right-handed varieties. (p. 276)

Patterns of mild electrical disturbance in the brains of epilepsy patients appear to foreshadow a seizure hours before its onset. (p. 276)

Researchers taking one of the closest looks yet into the intact proton have found an unexpectedly complex interior electromagnetic environment. (p. 277)

Lead can damage a young child's ability to learn and reason at exposures far lower than the limit deemed acceptable by the U.S. government. (p. 277)

Astronomers may finally have glimpsed a key step in the construction of a planet. (p. 278)

What looks like the ultimate bad choice in romance—a mate from a different species—in some conditions may not be so dumb after all. (p. 278)

Dolphins apparently recognize their own reflections. (p. 279)

A compound called vasointestinal peptide, which binds to immune system T cells and macrophages, thwarts arthritis in mice. (p. 279)

Brain areas considered crucial for understanding language may also play an important role in music perception. (p. 280)

A substantial proportion of children in grades 6 through 10 report bullying other children or being bullied themselves. (p. 280)

Extended use of the illicit drug called MDMA or ecstasy exacerbated memory problems in users aged 17 to 31, none of whom reported alcohol dependence. (p. 280)

The breast cancer drug tamoxifen can widen a narrowed coronary artery in men with heart problems. (p. 280)

The recent discovery of coelacanths off the northeastern coast of South Africa was the first sighting of the rare fish in that country since the first living coelacanth, a type of fish thought to have been extinct for millions of years, was caught there in late 1938. (p. 282)

Researchers have made nanotubes with specific sizes and traits by designing molecules that self-assemble. (p. 285)

Researchers have created the smallest stable, freestanding inorganic nanotubes yet. (p. 285)

In an odd twist, material that is so extremely yielding that it is said to have negative stiffness will make already stiff materials even stiffer when it's blended into them. (p. 285)

Without breaking any physical laws, a novel, fiberglass-copper structure affects microwaves so strangely that a beam of radiation passing through it bends at an angle opposite from what it get bent at an angle opposite from what it would have exiting any other known material. (p. 285)

Makers of nanowires may overcome the limits that loom for microchip fabrication. (p. 286)