(p. 17)

Music’s roots may lie in melodic exchanges between mothers and babies (p. 18)

(p. 21)

(p. 22)

Emotionally evocative, yes, but music goes much deeper (p. 24)

(p. 25)

(p. 27)

(p. 28)

Playing instruments gives brains a boost (p. 30)

(p. 32)

New work is solving paradoxes by making the impossible impossible. (p. 5)

Three partial proteins may trigger the T cell immune reactions that cause the symptoms of this intestinal ailment, new research shows. (p. 8)

Testing shows that a complex array of factors can be used to calculate the probability of in vitro fertilization success better than just using woman’s age as a guidepost. (p. 8)

Scientists have developed the first topical treatment that can prevent HIV infection among women. (p. 9)

A new technology delivers vaccines through a Band-Aid–like patch. (p. 9)

Pancake batfishes may be getting oiled before they get named. (p. 10)

Mouse breath triggers special cells in the nose that help send a safe-to-eat message. (p. 10)

Biologists test the pros of amphibian athletics. (p. 11)

A 29- to 28-million-year-old primate fossil found in Saudi Arabia assists scientists in timing a major evolutionary transition. (p. 11)

Researchers study how folds and other creases disappear. (p. 12)

New experiments confirm a fundamental postulate of quantum mechanics. (p. 12)

Researchers discover a fresh meteorite impact crater using Google Earth. (p. 13)

Gene variants that offer protection against African sleeping sickness may also put carriers at renal risk, a new study finds. (p. 14)

A gene governing production of male reproductive cells goes back to a common ancestor that lived about 600 million years ago, a study finds. (p. 14)

Reprogrammed stem cells retain molecular memories of their former identities, two new studies show. (p. 15)

Fermilab results heat up the race for an elusive particle. (p. 16)

Stellar record-holder weighs in at 265 times mass of sun (p. 16)

(p. 4)

(p. 4)

(p. 34)

Review by Bruce Bower (p. 35)

(p. 35)

(p. 35)

Music perception researcher Ian Cross ponders music's nature and significance. (p. 36)