general relativity
Philosopher Jürgen Renn Explains Einstein's Theory of General Relativity
Where does revolutionary knowledge come from?
100 Years After Einstein's Relativity, We're Still Just Figuring Gravity Out
The most apparent of forces is still far and away the most mysterious of them.
Lost Satellites Will Help Test Einstein's Theory of General Relativity
Two of the ESA's Galileo positioning satellites wound up in the wrong orbit, but it's not all for naught.
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