Chinese rocks have yielded fossil remains of a creature that had rodentlike incisors and a hefty overbite, providing the first distinct dental evidence for plant-eating habits among theropod dinosaurs. (p. 179)

Researchers add to mounting evidence that household pesticide exposure may be a significant risk factor for childhood leukemia. (p. 179)

Two teams of astronomers reported that they had confirmed the existence of a new class of black hole. (p. 180)

The discovery of an enzyme scientists are calling cyclooxygenase-3, which is disabled by acetaminophen, might explain why this drug can stop pain and fever but not inflammation. (p. 180)

A new experiment shows that lasers can be a safe tool for cleaning paintings. (p. 181)

In beaugregory damselfish, males that snack on some of the eggs supposedly in their care may end up benefiting the rest of the egg clutch by making more oxygen available. (p. 181)

Parasites infect male mammals more often than females, possibly contributing to the tendency among mammals of males to die earlier than females. (p. 182)

Alex Wiedenhoeft belongs to the elite profession of wood identifier, the person to call when a crime investigator, museum curator, archaeologist, or patent attorney with an unusual client really needs to know what that splinter really is. (p. 184)

Theories of the evolution of the human mind are evolving, with some researchers now presenting alternatives to the dominant notion that genetic competition for survival during the Stone Age yielded brains stocked with a bevy of instincts for specific types of thinking. (p. 186)

To curb the growth of cancer cells, scientists are silencing genes by introducing small strands of RNA. (p. 189)

A rare group of ultradense stars may be magnetars, objects with the strongest magnetic fields known in the universe. (p. 189)

Researchers who tracked down the location of a German cave where the first Neandertal skeleton was discovered in 1856 have unearthed new Neandertal finds. (p. 189)

A molecule in sperm triggers a fertilized egg to begin developing. (p. 189)

Subtle bone loss associated with advanced gum disease can be linked to elevated lead concentrations in the blood. (p. 190)

An herbal remedy that had been popular among prostate cancer patients was tainted with three synthetic drugs. (p. 190)

A new study suggests that at least some members of the Kuiper belt, the reservoir of comets and other frozen objects that lie beyond the orbit of Neptune, reflect more sunlight and are considerably smaller than previously calculated. (p. 190)

A judge's decision gives scientists the right to study the 9,000-year-old skeleton dubbed Kennewick Man rather than turn the remains over to a coalition of Native American tribes for reburial. (p. 190)