Scientists analyzing fragments of a Tyrannosaurus rex's leg bone have recovered soft, pliable material, including structures that apparently are cells and blood vessels. (p. 195)

Two teams of scientists report that they have for the first time directly detected the glow of planets that circle sunlike stars hundreds of light-years from Earth. (p. 195)

A gram of small, air-polluting particles has deadlier effects in certain seasons and regions of the country than in others, and particulate pollutants may disrupt heart function most in people who already have cardiovascular problems. (p. 196)

New research suggests that bacteria may keep the cells they infect alive longer by tugging on the cells' membranes. (p. 196)

Coating medical implants such as glucose sensors and coronary stents with copper-doped polymers could dramatically extend the devices' functioning. (p. 197)

Two captive African elephants—one rumbling like a truck and the other chirping like a different elephant species—show they may be the first land mammals other than primates to learn vocal imitations. (p. 197)

A minimal amount of parent-directed training at home allows babies to sustain facial-discrimination skills that they would otherwise lose by age 9 months. (p. 198)

A growing number of reports highlight imagination's pervasive influence on thinking, one example of which is the surprisingly large proportion of well-adjusted preschoolers who play with make-believe companions. (p. 200)

A new theory of planet formation suggests that sizzling-hot Earths may be abundant throughout the galaxy and could soon be detected. (p. 203)

An antiretroviral drug under development may work in patients for whom existing drugs fall short. (p. 205)

College-educated older adults recruit new brain areas to counteract some of the memory loss that occurs with aging, a new brain-imaging study suggests. (p. 205)

X rays emanating from Jupiter's midriff actually originate on the sun, new observations show. (p. 205)

The most detailed study yet of body language of ant larvae translates a swaying motion as begging for food and a chance at a better future. (p. 205)

A pesticidal additive in the paint applied to ship hulls may be contributing to the worldwide decline of corals. (p. 206)

Breakdown products in brominated flame retardants, traces of which circulate in the blood of most people, may perturb the normal production of reproductive hormones, a new test-tube study suggests. (p. 206)

A Nigerian pharmacologist has found in local plants a potential antidote to some of the world's most deadly snake venoms. (p. 206)

(p. 207)