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19702
The photo in this article looks to me more like a solar eclipse, complete with a clear-cut circular blackout in the center and flares. Mike PattersonGrand Rapids, Mich. The similarity is because astronomers used an occulting disk on the telescope to block the glare of the central star .—R. Cowen
By Science News -
Health & MedicineMeasuring Stick: Spinal tap test tracks Alzheimer’s compound
A new test is the first to measure production and clearance of amyloid-beta in the cerebrospinal fluid of people, enabling scientists to track this Alzheimer's disease peptide.
By Nathan Seppa -
Getting Back at Celiac: Enzyme treatment might stem wheat intolerance
A combination of two enzymes could eventually treat celiac disease, an inherited digestive disorder.