Gravity waves.

As most people know gravity (which is related to mass & space) and time is related, called spacetime. Scientists have setup an experiment involving beams of light over two long distances and mirrors to try and capture gravity waves.

Their theory is that a gravity wave distortion will increase or decrease the length the light travels over for one of the distances and when the two pieces of light meet together they will be sync. This is however great in theory but they have forgotten one thing and wasted millions of dollars. Time. A distortion is space has an effect on time. When gravity is increase or decreased time also is effected. The results would show that using time to measure the distortion will be impossible because gravity and times relationship would remain constant. They are yet to find a gravity wave using this method. No surprise there.