págs. 2-4
Spit and image: The wonderful world of mucus.
págs. 10-13
Shaken city: Two years after its big quake, Christchurch is still trembling.
págs. 14-23
Three sides of Everest: There's more to a mountain than the summit.
págs. 24-35
Ponderosa heights: Multilevel living in Arizona.
Robert H. Mohlenbrock, Rob Klotz (fot.)
págs. 36-39
pág. 48
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