págs. 6-6
Singing in the Brain: Hummingbirds don't just hum-they sing. And they learn the tunes from one another.
págs. 14-16
Seeds of Fortune: How does a fir tree cross a desert?. By winning a lottery.
págs. 28-29
Cast-Iron Forest: Remmants of a dense oak forest survive in Texas, Oklahoma, and Kansas.
págs. 30-31
Rings Around the Planets: Saturn's most prominent feature is no longer a singular phenomenon.
págs. 32-34
págs. 34-34
High and Dry: If a tree grows too tall, it may end up with broken water pipes.
Carl Zimmer, Sally J. Bensusen (fot.)
págs. 36-37
Syphilis and the Shepherd of Atlantis: The most "poetic" statement about the dreaded plague is not an early physician's hexameter but the modern map of the pathogen's genome.
págs. 38-42
The Knuckle-Walking Wounded: In Uganda, chimpanzees are sometimes caught in poachers' snares.
págs. 44-48
The Viking's Silent Saga: What went wrong with the Scandinavian westward expansion?
págs. 50-57
Touchy Harvestmen: For a striped daddy longlegs, when it's time to mate, the only option is a blind date.
Rogelio Macías Ordóñez, Joe Warfel (fot.)
págs. 58-61
The Uses of Crying and Begging: Thtoughout the animal kingdom, helpless offspring have ways of demanding attention that parents can't ignore. But all the yelling and screaming and peeping and bleating may communicate much more than mere hunger and thirst.
págs. 62-67
Crystal Eyes: Five hundred million years ago, trilobites looked at the world through clear calcite glasses.
págs. 68-73
Doubling Time: Half of all research papers ever published in astrophysics have appeared in the past fifteen years.
págs. 84-87
Pushing the Envelope: Scientists who study environmental extremes are looking at how organisms-including humans-adapt to such conditions.
págs. 88-90
pág. 91
John Cancalosi (fot.), Judy Rice
págs. 94-95
págs. 96-96
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