Yale Environment 360, May 17, 2012

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For the past few years, Douglas McCauley has been tracking Pacific manta rays that live around a chain of remote islands called Palmyra Atoll. McCauley, a marine biologist at the University of California at Berkeley, and his colleagues tag the giant fishes with “pingers” — acoustic devices that emit pulses — and then follow the sound. “You’re in a boat, following the animal night and day,” says McCauley.

The scientists embarked on this study to learn more about the ecology of these majestic animals. “There’s remarkably little known about manta rays,” McCauley says.

Continue reading “The Vital Chain: Connecting The Ecosystems of Land and Sea” →

Discover, May 15, 2012

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Theodore Nash sees only a few dozen patients a year in his clinic at the National Institutes of Health in Bethesda, Maryland. That’s pretty small as medical practices go, but what his patients lack in number they make up for in the intensity of their symptoms. Some fall into comas. Some are paralyzed down one side of their body. Others can’t walk a straight line. Still others come to Nash partially blind, or with so much fluid in their brain that they need shunts implanted to relieve the pressure. Some lose the ability to speak; many fall into violent seizures.

Underneath this panoply of symptoms is the same cause, captured in the MRI scans that Nash takes of his patients’ brains.

Continue reading “Hidden Epidemic: 
Tapeworms Living Inside People’s Brains” →

The New York Times, May 7, 2012

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Discover, April 18, 2012

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Ahmad Hariri stands in a dim room at the Duke University Medical Center, watching his experiment unfold. There are five computer monitors spread out before him. On one screen, a giant eye jerks its gaze from one corner to another. On a second, three female faces project terror, only to vanish as three more female faces, this time devoid of emotion, pop up instead. A giant window above the monitors looks into a darkened room illuminated only by the curve of light from the interior of a powerful functional magnetic resonance imaging (fMRI) scanner. A Duke undergraduate—we’ll call him Ross—is lying in the tube of the scanner. He’s looking into his own monitor, where he can observe pictures as the apparatus tracks his eye movements and the blood oxygen levels in his brain.

Continue reading “Can a Brain Scan Tell You What Drugs to Take and Choices to Make?” →

The New York Times, April 16, 2012

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