It has been speculated for many years that UFO craft may travel using gravitational waves, including a wave amplifier built into craft as discussed by Bob Lazar in 1989. Next to that we have Dark Matter that scientists are still struggling to explain. It is believed that Dark Matter may be involved in much of the volume and expansion of our universe. Scientists have been working diligently to uncover these secrets and may be moving towards some solid answers. Charles Choi writing for Space.com is opening up this subject and providing an amazing yet short video and you can find it all HERE.