What If a Black Hole Ate the Sun?

It’s almost as old as the Universe, and as massive as 34 billion Suns. It eats stars for breakfast. And now it’s about to consume our own. Behold, the great...

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...

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 Oceans Were Liquid Mercury?

What’s shiny, liquid, conducts electricity and is also the surname of a legendary rock star? You guessed it, mercury. This naturally occurring element has a lot of...

What If the Universe Is Bouncing?

This is the Universe. And this little dot here is the Earth. And this is a Big Bounce coming up, and it’s about to squash our planet. Yikes. How long would we have...

What If You Could Hear Planets?

In space, no one can hear you scream. But just because sound can’t travel in the vacuum of space doesn’t mean that the planets and our Sun don’t make noise. What would...