Horizon plunges down the biggest rabbit-hole in history in search of the smallest thing in the Universe.
It is a journey where things don't just become smaller but also a whole lot weirder. Scientists hope to catch a glimpse of miniature black holes, multiple dimensions and even parallel Universes. As they start to explore this wonderland, where nothing is quite what it seems, ...
Mats Steen, a Norwegian gamer, died of a degenerative muscular disease at the age of 25. His parents mourned what they thought had been a lonely and isolated life, when they started receiving messages from online friends around the world.