8 years ago
100 Years After Einstein's Relativity, We're Still Just Figuring Gravity Out
As macro-scale collections of some 7 billion billion billion atoms per human body, our world appears to be dominated by gravity. It is our days and nights, our weather, our thudded footsteps, our fear of heights. The other fundamental forces deal exclusively with the very small—the strong force holds together atomic nuclei; the weak force governs radioactive decay; the electromagnetic force mediates interactions between charged particles—but gravity is like us.
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