The equations and formulae of Einstein's most famous theory - relativity, allow astronomers to understand how space and time behaves.
The trouble is, that as you get close to the Event Horizon his mathematics begins to fall apart. Einstein's equations need updating, but we can only do this if we know what it is like deep inside a Black Hole.
Remarkably, Berndt Mueller has a machine that does exactly that.
Supermassive Black Holes
What Happens in the Centre of a Black Hole?
1 x 60 min, Windfall Films for Discovery
Credit List
Produced, Directed and Filmed by Duncan Bulling
Editor Nick Scullard Executive Producers Dan Kendall and Carlo Massarella