A study of mice has identified a biological mechanism by which medications called atypical antipsychotics cause people to gain weight. (p. 141)

The theory of entanglement explains a newly observed behavior in a symmetrical hydrogen molecule: When the molecule fractures, the directions in which its constituent particles move are not always random. (p. 141)

A new compound that inhibits the activity of the alertness-promoting brain peptide orexin shows promise as a potential sleeping pill. (p. 110)

A controversial trial of a chemically modified fat called an interesterified fat suggests that it is more harmful than is a partially hydrogenated vegetable oil.

A controversial trial of a chemically modified fat called an interesterified fat suggests that it is more harmful than is a trans fat–rich, partially hydrogenated vegetable oil. (p. 84)

Twenty young women and 20 young men aced an early challenge in their scientific careers by becoming finalists in the annual Intel Science Talent Search. (p. 70)

Regular use of aspirin may prevent healthy adults from developing asthma. (p. 52)