What If The Earth Had Two Moons?

  But how would a second moon affect the ocean tides? Would months on Earth become longer or shorter? And would these two satellites inevitably collide to cause a...

What If You Fell Into a Black Hole?

How much do you know about black holes? What would happen if you fell into one? Say one day you were exploring space looking for a new planet for humans to inhabit, but...

What If We Flooded the Death Valley?

Humans have a knack for changing the environment. Often, these projects have effects we didn’t plan for. Sometimes, it’s disastrous. And other times, it gives us energy...

What If Every Planet Had a Twin?

Our Solar System has eight planets, a few dwarf planets and more than 200 moons. But wait. Are you seeing double? Or did every planet suddenly get a twin? Where would...

What If All Men Disappeared?

How would the world change if, all of a sudden, every biological man disappeared? Would the world become more peaceful? Why would you have to ration food? And why...