Fossils unearthed in Brazil strengthen the idea that some species of ancient flying reptiles snatched their meals on the fly, snapping up fish as they swooped low over the water's surface. (p. 35)

Immune cells contain a protein that can inhibit HIV replication if the AIDS virus lacks a key protein. (p. 35)

A new report shows that many cosmetics contain phthalates—a class of chemicals known to cause developmental deformities in animals. (p. 36)

People carrying a variant of a gene that encodes an immune protein called toll-like receptor 4 have a weaker defense against infections but appear to be less prone to heart disease. (p. 36)

A prominent physicist has lost his job following allegations that he fabricated the evidence underpinning his team's now-discredited discovery of elements 116 and 118. (p. 37)

Images of a planetary nebula, taken by the Hubble Space Telescope in 1997 but only recently assembled as a color composite, show a shroud of material cast off and ionized by the dying, sunlike star Henize 3-401. (p. 37)

A new study supports the hypothesis that dwindling energy stores in the waking brain induce sleep. (p. 38)

Analysis of residues from ancient Maya vessels has revealed that the pots held cocoa almost 1,000 years before its previously known earliest use. (p. 38)

A kiss can trigger allergic reactions. (p. 40)

Because people are becoming ever more dependent on underground aquifers as sources of water, scientists are striving to understand better how groundwater systems interact with the water that flows across Earth's surface. (p. 42)

Biologists have discovered a gene that may contribute to many cases of deadly skin cancer. (p. 45)

An epidemic of software errors in industrial computer programs is costing the United States $60 billion per year. (p. 45)

Allowing insulin-producing islets to grow in close contact with each other during cell culture may increase the chance of successful transplant into diabetic people. (p. 45)

Broadcast transmissions from a forest of antennas owned by Vatican Radio, outside Rome, appear to have boosted leukemia incidence in neighboring communities. (p. 45)

Powering aircraft by remote lasers works—at least on paper. (p. 46)

Researchers have found that men with prostate cancer are no more likely to have had a vasectomy than healthy men are. (p. 46)

Antioxidant vitamins that greyhound racers have been giving their animals to boost performance actually slow down the dogs. (p. 46)

Men and women gain weight differently and may lose it differently, too. (p. 46)