Injecting radioactive antibodies directly into the cavity left after a brain tumor is surgically removed lengthened patients' lives by as much as 40 weeks in a recent study. (p. 253)

Agents that bind to knots in the normally linear DNA sequence seem to prevent the expression of cancer-causing genes. (p. 253)

A distinctive organic chemical related to substances produced by modern flowering plants has been found in ancient fossil-bearing sediments, possibly helping to identify the ancestral plants that gave rise to flowers. (p. 253)

A supposed missing link between dinosaurs and birds that was first unveiled in 1999, and revealed to be a forgery soon thereafter, was actually cobbled together from parts of animals from two new species. (p. 253)

Selenium's anticancer benefits may depend on ingestion of the mineral in food, not as a purified dietary supplement. (p. 248)

Inflammatory bowel disease may initially be triggered by chemical reactions that deplete affected tissues of a key antioxidant. (p. 248)

Realizing that many cancers depend on antioxidants for their survival, researchers have successfully designed a dietary strategy that suppresses breast cancer growth and spread, at least in animals. (p. 248)

Breathing in smoke from another person's cigarette causes blood changes that reduce the likelihood that an individual will survive a heart attack. (p. 248)

Scientists are making progress toward inserting genes to cure impotence temporarily. (p. 237)

A dentist has found three compounds in saliva that could be used to gauge bone loss. (p. 237)

Scientists tinkering with a chemical now vital to life think they've recreated one of the central molecules that gave rise to the chemistry of life. (p. 212)

People don't see ultraviolet light but birds do, so studies of egg mimickry may need to stop relying so much on human vision. (p. 216)