1. What If You Were Caught in a Riptide?

    What If You Were Caught in a Riptide?

    9
  2. What If You Fell Into Jupiter?

    What If You Fell Into Jupiter?

    6
  3. What If All Helium Disappeared for 5 Seconds?

    What If All Helium Disappeared for 5 Seconds?

    19
  4. What If Earth Was a Pulsar Planet?

    What If Earth Was a Pulsar Planet?

    6
  5. Have Historians Discovered a Secret Civilization in the Amazon?

    Have Historians Discovered a Secret Civilization in the Amazon?

    20
  6. What If You Visited the Galaxy’s Most Dangerous Planet?

    What If You Visited the Galaxy’s Most Dangerous Planet?

    7
  7. What If All of Antarctica's Ice Suddenly Melted?

    What If All of Antarctica's Ice Suddenly Melted?

    46