News
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Health & MedicineSkeletal Discovery: Bone cells affect metabolism
A protein made by bone cells has a surprising influence on energy metabolism, and could have a role in treating diabetes.
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Health & MedicineSerotonin lower in shift workers
Workers who rotate between day and night shifts have less of the brain chemical serotonin than day shift workers do.
By Brian Vastag -
EarthBeware summer radon-test results
Measuring household radon levels in summer may give misleadingly low results.
By Janet Raloff -
AstronomyVeiled black holes
Many X ray sources in the sky could be active galactic nuclei smothered by gas and dust that blocks their emission of visible and ultraviolet light.