With the help of a molecule from the rabies virus, scientists have for the first time selectively ferried a drug across the blood-brain barrier to treat a neurological disease in mice. (p. 387)

After tracking how digital information weaves around the world, researchers have concluded that, structurally speaking, the Internet looks like a medusa jellyfish. (p. 387)

The parasitic worm that causes river blindness seems to be developing resistance to the only drug that controls it. (p. 388)

A quarry on the Virginia–North Carolina border has yielded fossils of an unusual gliding reptile that lived in the region about 220 million years ago. (p. 388)

Scientists have grown mouse stem cells on a bed of silicon nano-needles, hoping that they will be able to guide the cells' development through electrical stimulation. (p. 388)

A faster, simpler manufacturing technique could make a synthetic biofuel into an even stronger competitor to ethanol. (p. 389)

Fossils found in the head-thrown-back position, the so-called "dead bird" pose, probably died from central nervous system damage. (p. 390)

Courting male guppies that sport a tad more orange on one side of their bodies than on the other tend to flash that brighter side at females. (p. 390)

Scientists aboard planes that flew into the cores of Katrina and other hurricanes in 2005 collected unprecedented data on the structure and development of the massive storms. (p. 392)

After a meteoric rise, stents coated with drugs to prevent renarrowing of clogged arteries have begun to fall from favor among cardiologists. (p. 394)

People who take rosiglitazone, a popular diabetes drug marketed as Avandia, may face an increased risk of heart attack. (p. 397)

Perforated shells found in a Moroccan cave indicate that northern Africans made symbolic body ornaments 82,000 years ago, long before Europeans did. (p. 397)

Moths that make clicking noises at predatory bats are mimicking a defensive signal made by other moths that click and also taste bad. (p. 397)

Tree rings in ancient timber show that the Colorado Plateau experienced a 60-year drought in the 12th century. (p. 397)

A new self-healing material can repeatedly repair damage at the same spot. (p. 398)

Clownfish make "pop-pop-pop" noises at each other by clacking their teeth together in a novel way. (p. 398)

RNA snippets of a newly discovered type could be involved in the mechanisms of cancer. (p. 398)

Microscopic, fluorine-packed particles can make small, cancerous growths easier to detect. (p. 398)

(p. 399)