A new way to overcome tumors' defenses against the immune system marks an important step toward effective cancer vaccines. (p. 150)

With new production techniques, the total emissions of greenhouse gases and other pollutants from making and using solar panels are now only one-tenth as high as those of conventional power generation. (p. 133)

Resistance to pest-killing cotton crops is spreading among one species of caterpillar, but techniques to prevent the spread of resistance appear to be working for five other species. (p. 141)

Scientists learn how nerve cells sprout new connections by looking at thousands of distinct proteins simultaneously. (p. 125)

Researchers have found cells resembling stem cells in the mouse pancreas, suggesting new ways to treat diabetes. (p. 78)

Assembly of the first human-made microbial genome could pave the way for making microbes with synthetic DNA. (p. 52)

Scientists have discovered that human cells make RNA transcripts of telomeres, the repetitive DNA at the ends of chromosomes, a finding that could have implications for understanding aging and cancer. (p. 6)

Chromium supplements reduced some of the unhealthy effects of a sedentary lifestyle in rats. (p. 13)

A compound found in milk can mitigate damage to people's brains caused by stroke or diseases such as Alzheimer's. (p. 13)

Reducing activity of a gene in mice alleviates many of the symptoms of fragile X syndrome, a genetic defect that causes mental retardation in people. (p. 387)