Explanations of The Equivalence Principle
Dutch physicist and string theorist Erik Verlinde has generated a self-contained, logical derivation of the equivalence principle based on the starting assumption of a holographic universe. Given this situation, gravity would not be a true fundamental force as is currently thought but instead an "emergent property" related to entropy. Verlinde's approach to explaining gravity apparently leads naturally to the correct observed strength of dark energy; previous failures to explain its incredibly small magnitude have been called "the greatest embarrassment in the history of theoretical physics". However, it should be noted that these ideas are far from settled and still very controversial.
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