What If Planet X Was Real?

Over the past century, astronomers have speculated about the existence of a mysterious 9th planet lurking in the outer reaches of our solar system. Although we’ve...

What If We Drilled Through Mars?

  If you were to drill straight down into Mars, what would you find? Would the red planet reveal its true colors? Would you finally discover life on Mars? And how...

What If the Universe Is a Loop?

If you got into a spaceship, and traveled long enough and fast enough, could you eventually loop back to where you started? Assuming you don’t accidentally collide...

8 Minutes Without Oxygen?

You wouldn’t notice it at first. But every second, the air around you is thinning, just a little. Within 30 seconds, you’d be gasping. Engines would fail, hospitals...