(Encyclopedia) protactiniumprotactiniumprōˌtăktĭnˈēəm [key], radioactive chemical element; symbol Pa; at. no. 91; mass number of most stable isotope 231; m.p. greater than 1,600℃; b.p. 4,026℃; sp. gr…
First Place: $100,000 scholarship, Shannon Lisa Babb, 18, of Highland, Utah, for an environmental science project identifying the human impact to water quality along…
Leonardo Da Vinci (1452–1519) Italian Renaissance artist who was most famous as a painter but also excelled at drawing (particularly the human anatomy),…
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First Place: $50,000 scholarship, Natalia Toro, 14, Fairview High School, Boulder, Colo., for her physics project “Independent Analysis of Evidence for nu_mu <—> nu_tau Oscillations in the…
These books were chosen by a committee of librarians, educators, and other professionals for the Association for Library Service to Children. Younger Readers…
