You can have a herniated disc in any part of your spine. But most herniated discs affect the lower back (lumbar spine). Some happen in the neck (cervical spine) and, more rarely, in the upper back (thoracic spine). Wear and tear of the disc. As you age, your discs dry out and aren't as flexible.
General relativity is a theory of gravitation that was developed by Albert Einstein between 1907 and 1915. According to general relativity, the observed gravitational effect between masses results from their warping of spacetime. By the beginning of the 20th century, Newton's law of universal gravitation had been accepted for more than two hundred years as a valid description of the gravitational force between masses.
In 1916, Einstein published the general theory of relativity, which held that acceleration distorts the shape of time and space. In a nutshell, space and time are curved near a massive object â the fabric of space-time is distorted. Modern observations support this theory. Albert Einstein really was an Einstein. He had an IQ of 160, same as Stephen Hawking. That's quite a mind! And you can actually see what such a mind looks like: Pieces of Einsteinâs brain went on display in 2011.