system
Given the following post, respond as if you're commenting on Reddit:
human
Besides what its effects are do we know exactly what gravity is?

If not what are some leading theories today?

edit 1: The reason I was asking was because I remember reading somewhere that physicists still did not know if gravity was a particle yet to be discovered.
Some were writing that gravity was actually particles leaking into our universe from another starting off strong and becoming weak.
gpt
The leading theory is called general relativity and tells us that gravity is the curvature of spacetime, and objects in free fall (i.e. objects upon which no forces besides gravity act) move on generalized "straight lines" through the curved spacetime.