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• Halloween

  Cheesy Apparition Arachnid Attack Shrunken Heads Baked Pumpkin Are bats really blind? More Halloween >

• Earth

  Is the world too crowded? Why do we need trees? Natural Disasters

• Machines

  Amazing Aircraft Top Trains Big Construction Machines On the Farm Land Transportation More Machines >

• People and Places

  Our 7 Continents What are the 7 wonders of the modern world? Who travels with the U.S. President? America's Greatest Landmarks

• Space

  Stars and Meteorites What was the first manned moon landing like? What does NASA do? How do rocket engines work? What is space camp? What do astronauts eat? Why are spacesuits so important? What can the Hubble Space Telescope do? What is a lunar eclipse? How was Mars formed?