Analyses of the gnaw marks on bones of Majungatholus atopus, a carnivorous dinosaur from Madagascar, indicate that the creatures routinely fed on members of their own species. (p. 211)

The drug memantine slows the progression of late-stage Alzheimer's disease in patients previously considered untreatable. (p. 211)

A coot may tally the eggs in her nest, a rare example of an animal counting in the wild, suggests a new study. (p. 212)

Two gene mutations that cause autism suggest that nerve cell connections called synapses are key to the disorder. (p. 212)

Researchers have incorporated an efficient thermoelectric material into a prototype device that can cool or produce electricity. (p. 213)

The primary chemical in some plastics causes female mice to produce eggs with abnormal numbers of chromosomes. (p. 213)

Supermassive black holes at the cores of galaxies can blow out as much material as they swallow, creating high-speed winds that may seed the universe with oxygen, carbon, iron, and other elements essential for life. (p. 214)

Researchers are working on both more heat-tolerant materials and totally new designs for vehicles that might ultimately replace the space shuttle. (p. 215)

To inform the current debate on who should be vaccinated for smallpox given the possibility of—or in the event of—a bioterrorism attack, researchers are using mathematical models and data from vaccination campaigns and past smallpox outbreaks. (p. 218)

Seismometers recently installed near the South Pole reveal that the area is the quietest spot on the planet for eavesdropping on earthquakes. (p. 220)

Rats that were exposed to a marijuana-related chemical while in the womb show more memory lapses and hyperactivity than unexposed rats do. (p. 220)

Tracking the precise motion of a spacecraft orbiting Mars, planetary scientists have deduced that the core of the Red Planet is at least partially liquid. (p. 221)

People possess about 250 genes that encode short RNA strands rather than DNA. (p. 221)

Young children exposed to tobacco smoke face a greatly elevated risk of developing cavities in their baby teeth. (p. 222)

Moderate but sustained sleep deficits undermine alertness and other mental faculties to a potentially dangerous extent, although people who experience this level of sleep loss usually don't feel particularly drowsy. (p. 222)

The quality of a man's sperm declines as he gets older. (p. 222)

A recent discovery of fossilized salamanders pushes back a milestone in amphibian evolution by more than 100 million years. (p. 222)