And if gravity waves exist, quantum mechanics would mandate the existence of the corresponding particle, the graviton, which also has been predicted but never observed.

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Scientists may have just discovered Einstein’s gravitational waves
By GPD on January 12, 2016

Rumors are circulating that scientists have finally discovered gravitational waves – one of the most important variables in Albert Einstein’s understanding of how the universe works. If confirmed, the observations could become the biggest leap in physics in a hundred years.

When Einstein published his general theory of relativity in 1915, he propelled physics years forward and changed our understanding of how the universe works. He envisioned spacetime (a system containing three spatial dimensions and one time dimension) and gravity in a fresh way, showing us that spacetime was dynamic – not static – and that gravity warps space time in the presence of a massive object.

Einstein further predicted that gravity travels in waves. These ripples are like a net that reacts to space events – star explosions, galaxy collisions, anything on a massive scale. The events create ripples that warp the fabric of spacetime. The bigger the objects, the greater the ripples.

But the hunt for proof of the ripples has been on for decades. Einstein himself thought it would never amount to anything.

That is – until now (we think)....

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http://www.veteranstoday.com/2016/01/12/scientists-may-have-just-discovered-einsteins-gravitational-waves/