News
- Health & Medicine
Pulse pressure linked to dialysis death rate
People on kidney dialysis who have high pulse pressure—the difference between the top and bottom numbers on a blood pressure reading—seem to be at a greater risk of dying than those with low pulse pressure.
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Immune cells carry concealed weapons
Scientists propose that protein-cleaving enzymes called proteases are the real microbe destroyers in bacteria-killing cells called neutrophils.
- Humans
Web site debuts on junior high science
A new Web site reviews the accuracy of commonly used middle school physical science books and offers tips and assistance for teachers working from those texts.
- Agriculture
Journal disowns transgene report
The journal Nature now says it shouldn't have published a report that genetically engineered corn is leaking exotic genes into the traditional maize crops of Mexico.
