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Of all the objects bopping around in our universe, few are as bizarre and enigmatic as black holes.

Just ask Priya Natarajan. It's like the point where all known laws of physics break down.

She's an astrophysicist at Yale University studying extremely cool cosmological phenomena

like black holes. So for me the personal attraction, the gravitational pull pun intended,

to where black holes, I mean really is that they kind of represent the limits of knowledge.

Because way before black holes were mapped, studied, their picture taken, you may remember that

famous image from last year, black holes were just an idea. A mathematical solution to Einstein's

theory of general relativity. So you know Newton was able to tell us how gravity worked,

but Newton could not tell us why gravity is that way. Einstein was able to come up with this

beautiful theory that combined the shape of space matter and motion into one theory.

The theory of general relativity? Absolutely. The theory of general relativity does exactly that.

So it was this incredible sort of deep connection that he found between the shape of space,

matter and motion and therefore masses would distort space time which he envisioned as a

four-dimensional kind of fabric, a sheet. So picture our universe as a 4D fabric using space

and time and the fabric is bumpy dotted with planets and other kinds of matter.

And what matter does it causes little potholes in these sheets? You drop mass somewhere,

you create a pothole. And the size of the pothole, the depth of the pothole depends on the mass

of the object and how tightly packed the matter is in that object. Okay, massive objects cause a

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