Silicon carbide grains of type X constitute ~1% of all presolar SiC grains found in primitive meteorites. These grains have N and Si excesses, mostly light C, high inferred Al/Al ratios, and evidence (from Ca and Ti excesses) for the initial presence of the short-lived radioisotopes Ti and V. These isotopic signatures clearly indicate an origin in the ejecta of Type II supernovae (SNe) and mate...

In dark-matter detectors, three processes that arise from interactions with high-energy particles mimic sought-after signals, explaining observed excesses and requiring mitigation to discover low-mass dark matter.

Last month, we presented the evidence implicating plasma renin-angiotensin excesses (ie, excess plasma renin activity levels) as the cause of malignant hypertension and of its cardiac, cerebral, and renal vessel damage, which lead rapidly to fatal heart attack or stroke, or heart or kidney failure. We also showed that milder but inappropriate excesses of plasma renin angiotensin directly sustai...

In 1949 Robert B. Heilman published the essay "Hawthorne's 'The Birthmark': Science as Religion."^ The year of the Soviet Union's first successful test of an atomic bomb and four yeiirs after the United States' use of atomic weapons against the Japanese, 1949 was a year inclined to provoke concern about the practice of science as religion. Heilman's reading of Aylmer as a tragic overreacher who...