My great hope is that we will figure out how to meld gravity and quantum mechanics, realizing a dream that can be traced back to Einstein and that, in its more modern form, has captivated two generations of theoretical physicists. Such a theory might provide us the tools for gaining a clear understanding of the origin of the universe.
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"Brian Greene wrote in this article that: I am confident that well before 2040 we will nail down what dark matter is. Identifying dark energy will be harder, but we might nail that, too. I think that dark matter is simply virtual fermion-antifermion pairs and dark energy is simply virtual bosons." -- Jack Sarfatti