Natural history
First With a Flower: Some spring bloomers get a head start beneath the snow and ice.
págs. 12-13
Badlands and Oases: Palm trees are an unexpected sight in the California portion of the Sonoran Desert.
págs. 14-16
Storms on the Sun: The sunspot cycle's peak may bring more than the usual fanfare of iridescent night lights.
págs. 17-18
págs. 18-18
Calling a Bluff: Thanks to their long windpipes, some birds sound bigger than they are.
Carl Zimmer, Sally J. Bensusen (il.)
págs. 20-22
The Red Meat That's Good for You: Australians ponder solutions to their kangaroo problem.
págs. 37-41
Abscheulich! (Atrocious!): Haeckel's distortions did not help Darwin.
págs. 42-49
Duets and Drawls: When two scientists lent an ear to tropical stripe-backed wrens, they heard more than songs and calls; they heard family histories. Here they describe the unique vocalizing of a very social bird.
págs. 50-53
Asthma, Environment, and the Genome: Researchers are constantly adding to the list of substances that trigger asthma. They're also finding more and more genes that influence susceptibility. But the real problem may be our pampered immune systems.
págs. 54-65
págs. 66-69
Secrets of the Flooded Forest: Where do Amazonia's top aquatic predators nest?. Scientists find the hidden nurseries of black caiman.
John Thorbjarnarson, Ronis Da Silveira, Luiz Claudio Marigo (fot.)
págs. 70-78
Beasts and Brain Power: Specializations do not make one species "smarter" than another, but they do make for uniquely sculpted minds.
págs. 80-81
Kinship Envy: Musing on the ties of blood and marriage.
págs. 88-88
Michio Hoshino (fot.)
págs. 90-91
Running Out of Ice?: Polar bears need plenty of it.
págs. 92-92
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