This was influenced the evolution thread and I thought it was a good idea

Let's discuss the theory of gravity, it is a very interesting subject.

http://en.wikipedia.org/wiki/Gravity

Let me get us started

Why is it so weak to compared to other forces?

LMFAO

I do wonder about what causes gravity. Most of what we know is just that it definitely exists and the trends with which it increases and decreases dependent on mass and distance between the objects. But I wonder why it occurs in the first place, or if it is one of those simplest of laws that we'll never be able to find a reason for, it just is. I've heard a little bit about Gravitons which are supposedly packets of gravity that in some way are the reason the force exists, but I haven't really looked into it at all.

bigger masses attract smaller masses
thus gravity

Gravitons are a hypothetical elementary particle in the boson family I believe. They are not proven but experimental observations are being conducted, they are looking to analyse gravity waves or something. Also it could lead to telling us the speed of gravity and if it is slower than the speed of light then that means gravity could have mass, which is very interesting. Don't quote me on that though lol

When string theory matures we'll have a proper, quantum description of gravity that accounts for all of today's mysteries. But it's so hard that we can't even find the equations of string theory, never mind solve them.

Gravitons are a quantum analogue of classical gravitational action-at-a-distance. We can't directly observe them because of their properties and we can't incorporate them into a consistent theory because they are non-renormalisable at the moment.

Its not mass that is attracted to each other, energy is also acted upon by gravity.  It has been proven that light is bent by gravity (Einstien), which is why we can see objects behind the sun and why black holes are black.  Also, the flow of time changes with regards to gravity.  An astronaut who spent some time in space has experienced a few more seconds than people on Earth, and physicists theorize that time slows to a crawl around black holes.

Gravity is energy acting on spacetime.

Energy is not acted on by gravity... gravity is caused by particles with mass (itself caused by the vibrations of strings) distorting the shape of spacetime so that if a photon or whatever travels in a straight line it will be following a curved path. The attraction is a misleading observation by humans since we see no curvature.

What ultimately causes gravity is the fundamental symmetry of the mathematics governing the interaction of branes. Gravity is the same force as electromagnetism and the two others; it appears different because we live at low temperatures and thus symmetry breaking occurs.

Isn't everything in a constant freefall, but space is curved by an objects mass, so the freefall is curved by the space? The line it follows it straight but the actual space is curved. That's how I have always understood it, but I'm second guessing myself after doing a bit of reading lol.

Yes, you're right.

...have you looked at any books introducing quantum mechanics and similar topics? I particularly recommend In Search of Schrodinger's Cat by John Gribbin.