VERTEBRATE GROUPS REPTILES BIRDS MAMMALS AMPHIBIANS FISH WHAT DOES THE SKELETON DO? HOW MANY LIMBS DO VERTEBRATES HAVE? FIND OUT MOREAll vertebrates have an inner skeleton, including a skull…
U.S. Senator, Massachusetts Born: Dec. 11, 1943Birthplace: Denver, Colo. Kerry was raised Catholic in a family of privilege, and spent part of his childhood living in Europe. His mother was a…
The Particle ZooTheories of the UniverseForces, Particles, and Some Cosmological GlueSize in the MicrocosmThe Forces You Already KnowThe Particle ZooThe Last Train to Quarkville One of the most…
(Encyclopedia) muckrakers, name applied to American journalists, novelists, and critics who in the first decade of the 20th cent. attempted to expose the abuses of business and the corruption in…
(Encyclopedia) International Geophysical Year (IGY), 18-month period from July, 1957, through Dec., 1958, during a period of maximum sunspot activity, designated for cooperative study of the solar-…
(Encyclopedia) bariumbariumbârˈēəm [key] [Gr.,=heavy], metallic chemical element; symbol Ba; at. no. 56; at. wt. 137.327; m.p. 725℃; b.p. 1,640℃; sp. gr. 3.5 at 20℃; valence +2. Barium is a soft,…
(Encyclopedia) silicate, chemical compound containing silicon, oxygen, and one or more metals, e.g., aluminum, barium, beryllium, calcium, iron, magnesium, manganese, potassium, sodium, or zirconium…
(Encyclopedia) star cluster, a group of stars near each other in space and resembling each other in certain characteristics that suggest a common origin for the group. Stars in the same cluster move…
(Encyclopedia) technetiumtechnetiumtĕknēˈshēəm [key] [Gr. technetos=artificial], artificially produced radioactive chemical element; symbol Tc; at. no. 43; mass no. of most stable isotope 98; m.p. 2,…
By John Gettings, Mike Morrison, and Gerry Brown A TRAGIC FINAL LAP NASCAR's Winston Cup series didn't just lose a seven-time champion when Dale Earnhardt, 49, died in a last-lap crash at…
