How does mass have anything to do with gravity?

Question

I was watching a Vsauce video and learned that any two objects, like two baseballs, are attracted to each other because of their mass, and the bigger the mass, the more gravity an object has. What does mass have to do with gravity, and what causes gravity? Why does something just attract other things around it?

In: Physics

Answer 1

We don’t know the answer. We know how much gravity, and roughly how it propagates, but we don’t know why.

We just know that mass/energy create space curvature that is otherwise perceived as an attraction, but we don’t know why it happens.

[Feynman on “why?”](https://www.youtube.com/watch?v=Q1lL-hXO27Q)