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EarthRemnants of Earth’s crust survive in the planet’s interior
A slab stayed unperturbed in the mantle for billions of years before resurfacing, sulfur measurements suggest.
By Erin Wayman -
LifeWhy corals do calisthenics
Pulsating motion appears to flush water to improve photosynthetic efficiency in symbiotic algae.
By Susan Milius -
EarthYangtze’s age revealed
Geologists narrow window on time of the Chinese river’s origin to 23-36 million years ago.
By Erin Wayman -
HumansThe psychology of J.C. Penney: Why shoppers like it when retailers play games with prices
Last year, J.C. Penney CEO Ron Johnson put an end to “fake prices,” the ones that customers see but rarely pay because of coupons and sales.