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  1. What If We Entered a New Ice Age?

    What If We Entered a New Ice Age?

    30
  3. What If Jupiter Collided With Earth?

    What If Jupiter Collided With Earth?

    2
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    16
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  4. What If Lizard People Ruled the World?

    What If Lizard People Ruled the World?

    22
  5. What If All Helium Disappeared for 5 Seconds?

    What If All Helium Disappeared for 5 Seconds?

    37
  6. Mission to Mars - SpaceX Dragon - Old Mars Mission Concept

    Mission to Mars - SpaceX Dragon - Old Mars Mission Concept

    394
  7. What If Dinosaur Killing Astroid Hit Earth Today?

    What If Dinosaur Killing Astroid Hit Earth Today?

    29
    1
  8. What If You Lived In A Permain Period?

    What If You Lived In A Permain Period?

    2
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    20
  9. What If You Crashed on an Alien Planet?

    What If You Crashed on an Alien Planet?

    11
  10. What If the Moon Orbited Earth Faster?

    What If the Moon Orbited Earth Faster?

    24
  11. What If You Spent 5 Seconds on Io?

    What If You Spent 5 Seconds on Io?

    18
  12. What If Earth Was a Spaceship?

    What If Earth Was a Spaceship?

    19
  13. The First 48 Hours After Aliens Make Contact

    The First 48 Hours After Aliens Make Contact

    23
  14. What If We Nuked Jupiter?

    What If We Nuked Jupiter?

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    15
    1
  15. What If Cthulhu Was Real?

    What If Cthulhu Was Real?

    17
  16. What If Earth Gradually Came to a Standstill?

    What If Earth Gradually Came to a Standstill?

    17
  17. NASA 50th Anniversary Lecture - Stephen Hawking Part 3

    NASA 50th Anniversary Lecture - Stephen Hawking Part 3

    33
  18. What If Giant Insects Never Went Extinct?

    What If Giant Insects Never Went Extinct?

    20
  20. Let's reproduce the calculations from Interstellar

    Let's reproduce the calculations from Interstellar

    23