This program explores recent research into what the universe is made of by putting dark matter, dark energy and variable gravity in the spotlight, as the world's leading cosmologists attempt to explain the biggest problem in physics today. According to the best estimates, we know that about 4% of what the universe is made of matter. The rest is presumed to be made of mysterious entities about which very little is understood -- 21% dark matter and 75% dark energy.
This Standard Model has its skeptics who insist that nothing's missing at all and that the real problem is far, far worse: They claim that modern gravity theory -- like Newton's and Einstein's approximations of a gravity theory before -- is just plain wrong, and needs to be rewritten.
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