Hi, we're here from Curiosity.com to help you get smarter in just a few minutes.

I'm Cody Gough.

And I'm Ashley Hamer.

Today you learn from renowned theoretical physicist Sean Carroll about why we don't understand how

gravity works and how we can figure it out.

You'll also learn about enormous balloon-like structures that scientists have discovered

in the center of our galaxy.

Let's set us some curiosity.

We don't understand how gravity works.

Are you surprised?

Well, Sean Carroll is not.

He's a renowned theoretical physicist

at the California Institute of Technology

and one of the world's most celebrated science writers.

His newest book is called Something Deeply Hidden,

Quantum Worlds and the Emergence of Space Time.

And in it, he argues that scientists need to start digging into the serious questions around the inner workings of quantum physics.

Sean told us that we need to start asking those questions now if we ever want to understand how our universe really works.

You know, gravity we understand a lot about on the basis of general relativity,

Einstein's theory of gravity that we got almost exactly 100 years ago,

and Einstein said that space time itself is curved.

It changes, it has dynamics in response to the existence of matter and energy and that curvature

...