Anti-de Sitter space bell. It might be described as being the "opposite" of the surface of a sphere, which has a positive curvature. General relativity is a theory of the nature of time, space and gravity in which gravity is a curvature of space and time that results from the presence of matter or energy. Energy and mass are equivalent (as expressed in the equation "E" = "mc"), and space and time can be translated into equivalent units based on the speed of light ("c" in the "E" = "mc" equation). A common analogy involves the way that a dip in a flat
The Fox (What Does the Fox Say?) The Fox (What Does the Fox Say?) "The Fox (What Does the Fox Say?)" is an electronic dance novelty song and viral video by Norwegian comedy duo Ylvis. The top trending video of 2013 on YouTube, "The Fox" was posted on the video-sharing website on 3 September 2013, and has received over 800 million views as of November 2018. "The Fox" peaked at the top of the Norwegian Singles Chart and was hugely successful in the United States, where it peaked at number six on the "Billboard" Hot 100 for three consecutive weeks, and was, before the US release of