What If the Sun Swallowed Earth?

The Sun’s core is shrinking. But as its core shrinks, the Sun itself grows larger. And it will continue to grow, until one day, it engulfs the Earth. How long can you...

What If You Met a Time Traveler?

If time travel is possible, why haven’t we met a single time traveler yet? And if we did meet one, how would we know they weren’t faking it? What would their...

What If We All Lived on Mars?

People on Earth talk a lot about colonizing Mars. But What If it had already happened and the first humans had already settled down on the Red Planet?

What If You Fell Into Quicksand?

Movies love quicksand. And why not? It’s exotic, it’s dramatic, and it’s highly exaggerated. Fun fact: it’s impossible to become fully submerged...

What If We Discovered Earth 2.0?

Could there be an even better planet for us than Earth? Scientists are searching for a superhabitable world that wouldn’t just rival Earth, but be a place where life...