thorough

But Patrick Huey, an adviser with offices in Naples, Fla., and Portland, Ore., said to consider such opportunities “only after thorough vetting and always as a complement, not a core, holding.”

Echeverría said a thorough investigation would be carried out to identify the cause and that work was under way to quickly restore power.

"We are exploring all possibilities and will conduct a thorough investigation, taking all possibilities into account. All options will be investigated immediately and we will present the results to the public," he added.

He added that they were "closely monitoring" the situation and collecting data so that they could determine the cause of the illnesses but emphasised that Bovaer had "undergone a long and thorough approval process".

To tackle this, the team produced a thorough framework describing how different theoretical types of black holes would vary from Einstein's predictions and how those differences would appear in images.