Could jets of X-rays from black holes hold the key to the Earth's energy demands? Maybe not in the short term, but as scientists begin a sixth decade of studying stellar X-ray sources - the prospect of harnessing them may well be edging closer.
More: http://www.bbc.co.uk/news/science-environment-19096811 (http://www.bbc.co.uk/news/science-environment-19096811)