List/Grid Monthly Archives: January 2016

aplanet

The Planets

Many people don’t know that on an clear winter night, you can see five planets with no telescope. But where are they? How can you tell if you’re looking at a star, a jet or a ...
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Skyscrapers

  DOWNLOAD THE PDF What single building has 73 elevators and enough structural concrete to pave 200 miles of sidewalks? The Freedom Tower in New York City. Is it the world’s ...
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