In 1915, Albert Einstein published his general theory of relativity, which described gravity as a fundamental property of space-time. He came up with a set of equations that relate the curvature of space-time to the energy and momentum of the matter and radiation that are present in a particular region.
A hundred years later, Einstein’s theory of gravitation has withstood all the tests that scientists could throw at it. But until recently, it wasn't possible to do experiments to probe the theory under extreme conditions to see whether it breaks down.
Now, scientists have the technology to look for evidence that could reveal physics beyond general relativity.
Today, 14th of March, 2015 is this great and brilliant scientist’s 100th birth anniversary. His theory produced some pretty wild predictions, which includes the possibility of black holes, which another brilliant scientist Stephen Hawking has proved. "There's a very good chance we will be detecting [gravitational waves] directly in the next couple of years," said Clifford Will, a theoretical physicist at the University of Florida. "What he wrote down is the same thing we use today," Will said.