"We compared what you see in these galaxies with what you see in the field galaxy population, other galaxies at the same epoch and distance, and there is a stark difference - far more star formation and black hole growth, " the Cambridge University scientist and Royal Society research fellow explained to the BBC News website.

BBC: NEWS | Science/Nature | Deepest X-rays tell merger story

Field owned a print shop in Livingston, population 6, 851, that was barely breaking even.

FORBES: Magazine Article

"The reality is we do this work better than anyone else in our field because we focus first on delivering first-rate care to the incarcerated population, " CMC spokeswoman Jessica Bassett told the newspaper.

WSJ: Pa. service company probed over NY inmate deaths