Scientists are fairly sure that Black Hole are real. They match the predictions of Einstein's Theory of Relativity, and astronmers observe phenomena in the Universe that support their existence.
But, so far there has been no direct evidence.
Shep Doeleman is trying to change that - by building a telescope the size of the Earth.
Supermassive Black Holes
How To Photograph 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