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Pueblo del Arroyo

IN NEW LIGHT  Recent research suggests that the ancient Chaco society of the U.S. Southwest was founded by locals and run by a female lineage for hundreds of years. The best-known Chaco structures are great houses, massive, multilevel buildings represented here by the remains of Pueblo del Arroyo.

baby orangutan

MOM’S A CHAMP  This baby orangutan could guzzle its mom’s milk for more than eight years, the longest of any wild mammal on record.

double-slit experiment

DO THE WAVE  Quantum matter acts like both a particle and a wave, as demonstrated by the famous double-slit experiment (illustrated above). Electrons sent through a pair of slits interfere like waves, creating peaks and troughs. This wave nature of matter could be used to create a tractor beam that could reel in atoms or molecules, a new study proposes.

Trees in Berlin

FEELING THE HEAT  Tree-lined streets in Berlin, shown, offer a lot of benefits for city residents. But during heat waves, the trees, along with other plants, can also contribute to poor air quality, a new study suggests.



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