There was another explanation that came up recently, called "emergent gravity". The author of the paper (linked below) believes that gravity is an entropic forc

There was another explanation that came up recently, called "emergent gravity". The author of the paper (linked below) believes that gravity is an entropic force (i.e., it is a result of entropy in the universe, but not a fundamental force in it's own right). You can read the author's blog for more info -- specifically, the post titled "Essential points of the paper". Blog: http://staff.science.uva.nl/~erikv/page20/page18/page18.html http://staff.science.uva.nl/~erikv/page20/page18/page18.html Paper (PDF): http://arxiv.org/PS_cache/arxiv/pdf/1001/1001.0785v1.pdf http://arxiv.org/PS_cache/arxiv/pdf/1001/1001.0785v1.pdf