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At the Apex

A cougar, silent and unseen in the thick understory, is emitting a beacon from its tracking collar. “She’s close, about a hundred meters to the north,” says Beth Orning, a Ph.D. student at Oregon State University. Orning has evidence that cougar No. C216 is raising a litter in this hidden ravine.

Grass-Fed Restoration

Fire, grazing and logging have all caused problems when they occurred in the wrong place at the wrong time for too long and too intensely. But researchers and land managers are finding that, if used strategically, these disturbances can become tools to control weeds, prevent juniper invasion and limit the extent of wildfire.

Forecast for Africa

In the summer of 2012, Zachary Dunn climbed onto the roof of a red-brick schoolhouse in Lela, a small village in southwestern Kenya. A crowd of children milled about on the ground, watching him attach a small weather station to the peak.

Capsules of Chemicals

Packaging certain insecticides inside tiny plastic pellets may amplify their toxicity in the environment, a new study suggests. The same chemical used naked — suspended only in water — was significantly less toxic than its capsulated counterpart, researcher Stacy Harper reported recently in the journal Environment International. The chemical in question (a “pyrethroid” whose active […]

Cerebral Songs

Douglas Robinson has “some kind of filing system in his brain that lets him readily access bird vocalizations even when he hasn’t heard them in years.”

Supersinks for Carbon

Keeping greenhouse gases sequestered in the tangled roots and soggy detritus of mangrove forests could be vital to keeping the planet cool enough for habitation, scientists say.