Source: The United States Coast Guard Our first lighthouses were actually given to us by Nature. Sailors sometimes used landmarks such as glowing volcanoes to guide them. In the Ancient World,…
These books were chosen by a committee of librarians, educators, and other professionals for the Association for Library Service to Children. Younger Readers…
WorldBolivia Nationalizes Natural Gas Industry (May 1): Under orders of President Evo Morales, the military takes over the country's energy fields. Moussaoui Sentenced to Life in Prison (May 3): A…
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2013 People in the News 2012 People in the News 2011 People in the News 2010 People in the News 2009 People in the News 2008 People in the News 2007 People in the News 2006 People…
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Bohr's Atomic TheoryTheories of the UniverseThat Old Quantum TheoryPlanck's ConstantPhotoelectric Effect Explained, the Quantum Strikes AgainBohr's Atomic Theory Neils Bohr is considered the…
You Can't See It, but It Has to Be ThereTheories of the UniverseThe Dual Nature of LightYou Can't See It, but It Has to Be ThereThe Experiment That FailedA Little Bit of Quanta Goes a Long Way An…
(Encyclopedia) radar, system or technique for detecting the position, movement, and nature of a remote object by means of radio waves reflected from its surface. Although most radar units use…
