(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) 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-…
Fourth of July Quotes Founders' Wisdom: quotations from signers of the Declaration of Independence Compiled by Elizabeth Olson We hold these truths to be self-evident…
RAINBOWSPLITTING LIGHTSUNSETCOLOUR SPECTRUMSEEING COLOURFIND OUT MOREOn a sunny day, the world seems light and colourful because our eyes are able to see differences in the wavelengths of light…
2002 Nobel Prize Winners Jimmy Carter, former president of the United States Peace: Jimmy Carter, former U.S. president and , were cited "for their work for a better…
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From small acts of defiance to mass marches and meetings, the civil rights movement fought for positive change and won. The movement was formed by people in the 1950s and 60s who would…
