págs. 2-4
A Desert Galápagos: Some animals inhabiting the white gypsum sand dunes of New Mexico shed their colors in less than 7,000 years.
págs. 16-18
Hoofprints: Since their domestication, horses have transformed people's lives-leaving a subtle trail of clues along the way.
págs. 26-32
Mental mirrors: Special cells in the brain mimic the actions and intentions of others, forming the basis of empathy and social connections.
págs. 34-39
Garden on the rocks: Poor nutrients, thin soils, and a helping of heavy metals make for rich, yet vulnerable plant communities.
págs. 40-44
Cool scene: A bog in Ohio is a reminder of the last ice age.
págs. 46-47
pág. 64
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