WHAT DO PHYSICISTS STUDY? WHAT ARE PHYSICAL PROPERTIES? HOW DO PHYSICISTS WORK? BIOGRAPHY: SIR ISAAC NEWTON English, 1642–1727 EQUATIONS APPLIED PHYSICS FIND OUT MORE
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WHAT IS THE UNIVERSE MADE OF? HOW BIG IS THE UNIVERSE? BIG BANGDARK MATTERFIND OUT MOREThe Universe is everything that exists—space and all the stars, planets, and other matter it contains.…
Bill Clinton: Whitewater, Paula Jones, and Monica Lewinsky by Ann-Marie Imbornoni and Tasha Vincent Clinton became the 42nd U.S. president following a turbulent political campaign that included…
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(Encyclopedia) cobalt, metallic chemical element; symbol Co; at. no. 27; at. wt. 58.9332; m.p. 1,495℃; b.p. about 2,870℃; sp. gr. 8.9 at 20℃; valence +2 or +3. Cobalt is a silver-white, lustrous,…
(Encyclopedia) rainbow, arc showing the colors of the spectrum, violet inside and red outside, which appears when the sun shines through water droplets. It often appears while the sun is shining…
(Encyclopedia) shark, member of a group of almost exclusively marine and predaceous fishes. There are about 250 species of sharks, ranging from the 2-ft (60-cm) pygmy shark to 50-ft (15-m) giants.…
(Encyclopedia) science fiction, literary genre in which a background of science or pseudoscience is an integral part of the story. Although science fiction is a form of fantastic literature, many of…
(Encyclopedia) Raphael Santi or Raphael Sanzio, Ital. Raffaello Santi or Raffaello SanzioRaphael Santiräfˌfäĕlˈlō sänˈtē, sänˈtsyō [key], 1483–1520, major Italian Renaissance painter, b. Urbino. In…
