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Micrographs of nerve cells taken with different types of light microscopes.
Otitis media. This illustration shows an inflamed tympanic cavity, which is the most common source o
Cross section of heart with pacemaker leads
Toussaint L’Ouverture leads a revolt of slaves against the French in Haiti—the first and only major
Chess and risk
Men who are at risk for heart disease and report work-related stressors are at greater risk of death ...