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  1. Bill Gates Gives $100 Million to Fight Alzheimer's Disease (17-11-14)
  2. New Information Adds to Understanding of Black Holes (16-9-27)
  3. People Showing Concern about Disappearing Plant Life (13-5-1)
  4. Three man who had a big influence on modern sound and communication technologies (13-4-24)
  5. How the 'Mercury 13' Led the Way for Women in the US Space Program (13-4-10)
  6. A Visit to America’s National Cryptologic Museum (13-4-4)
  7. Ancient Martian Conditions Could Have Supported Life (13-3-28)
  8. The most unusual national parks in the United States (13-3-20)
  9. Laser Technology Uncovers Secrets at Stonehenge (13-3-13)
  10. Plastic Recycling (13-3-6)
  11. New Orleans, Havre de Grace: American Places That Hold Special Memories (13-2-27)
  12. Music Would Not Be The Same Without the Guitar (13-2-13)
  13. The History of the Laser (13-2-6)
  14. Nam June Paik Turned Video into an Object of Art (13-1-23)
  15. A Visit to Two National Parks: Mount Rainier and Valley Forge (13-1-16)
  16. Voyager: The Extraordinary Story of a Flight Around the World (13-1-9)
  17. How English Evolved Into a Modern Language (13-1-2)
  18. Where Did the English Language Come From? (12-12-26)
  19. The Missouri is America’s Longest River (12-12-19)
  20. Lighthouses Keep Watch Over the North Carolina Coast (12-12-12)
  21. MOOCs Are Moving Forward (12-12-5)
  22. Older Populations Are a Fact of Life for Many Countries (12-11-28)
  23. 1890's Gold Rush (12-11-21)
  24. Hungry for Wealth, Gold Seekers Once Rushed to Canada’s Northwest (12-11-14)
  25. Eleanor Creesy Helped Guide One of the Fastest Sailing Ships Ever Built (12-11-7)
  26. Edwin Hubble Changed Our Ideas About the Universe and Its Birth (12-10-31)
  27. High and Fast: the X-15 Reached the Edge of Space (12-10-24)
  28. Jimmy Doolittle: a Pilot and Leader (12-10-17)
  29. William Shakespeare: Star of Stage and Screen (12-10-10)
  30. The Works of William Shakespeare Remain Full of Life (12-10-3)
  31. Apollo's Final Missions: The Last Footsteps on the Moon (12-9-26)
  32. Apollo 13: 'Houston, We've Had a Problem Here' (12-9-19)
  33. ‘One Small Step for Man:’ Apollo 11 And the 1st Moon Landing (12-9-5)
  34. NASA and the Early Apollo Flights of the 1960s (12-8-29)
  35. As Gemini Spacecraft Join in Space, US Moves One Step Closer to the Moon (12-8-22)
  36. Race to the Moon: The Days of Project Gemini (12-8-15)
  37. Project Mercury: Alan Shepard Becomes the First American in Space (12-8-8)
  38. Project Mercury: The American Space Program Begins (12-8-1)
  39. International AIDS Conference Returns to Washington After 22 Years (12-7-25)
  40. Dry Tortugas National Park Is Deep In History, Natural Beauty (12-7-18)
  41. Rapping, From Arab Spring to Occupy Wall Street (12-7-11)
  42. From a Photo of War, a Statue to Remember (12-7-4)
  43. Ballet’s History Began as a Dance of Power and Influence (12-6-27)
  44. Three Stories about Expressing Faith in America (12-6-20)
  45. The Indiana Dunes: Ancient Hills of Sand on Lake Michigan (12-6-13)
  46. Finding Your Position on the Globe Was Not Always Easy (12-6-6)
  47. The Erie Canal Helped America Grow (12-5-30)
  48. On the Shoulders of Giants: Isaac Newton and Modern Science (12-5-23)
  49. Leonardo da Vinci: Beyond the Mona Lisa (12-5-16)
  50. The US Capitol Represents American Democracy (12-5-9)
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