Gravitational Waves ExplainedThe last piece of Einstein's Theory of Relativity has been directly observed.Posted: February 12, 2016 at 8:17 AMTags: explainedgravitational-wavesvideo
The Difference between the United Kingdom, Great Britain and England ExplainedPosted: December 29, 2012 at 9:13 AMTags: differenceEnglandexplainedGreat BritainUnited Kingdomvideo
