Doctor Who: Series 6 Epic Fan Trailer (by Silurian53)
Reblogged from Doctor Who Official on Tumblr
When does a quantum system stop existing as a superposition of states and become one or the other? More technically, when does the actual quantum state stop being a linear combination of states, each of which resembles different classical states, and instead begins to have a unique classical description? I just don't know...
Doctor Who: Series 6 Epic Fan Trailer (by Silurian53)