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    49
  2. How does the web work? |SPAIDER| |WEB| |INSECT|

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    0
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    24
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    29
  5. How Do Spacecraft Slow Down? We Asked a NASA Technologist

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  6. IS IT POSSIBLE TO OBSERVE THE GREAT WALL OF CHINA FROM SPACE? FIND OUT: - HD | DISCOVER CHINA

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    1
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    1
  9. ANIMALS WITH THE SHORTEST AND LONGEST LIFESPANS -HD

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  10. FACTS ABOUT OPTICS: WHY IS THE SKY BLUE? | HOW IS THE RAINBOW FORMED -HD

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  12. 6 ANIMAL SPECIES THAT COULD DEFEAT A GORILLA - HD | WILD LIFE | ANIMAL FIGHT

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  13. COSMIC RADIATION EXPLAINED!! -HD | COSMIC RAYS | ORIGIN OF COSMIC RAY | PROTONS

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  14. ARE WE LIVING IN A SPACE-TIME CONTINUUM? DOES IT EVEN EXIST? -HD

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  15. EINSTEIN'S THEORY OF RELATIVITY AND BLACK HOLES : FACT OR FICTION? -HD

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  20. MYSTERIES OF THE MOON: WHAT WE STILL DON'T KNOW AFTER APOLLO |MOON| |NASA| |MYSTRIES| |SPACE|

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  21. MOON LANDING |APOLLO 11| |NEIL ARMSTRONG| |MOON| |NASA|

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  22. SOLAR ACTIVITY AND SUN FLARES

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