In an article published Wednesday by Granma, Cuba's official newspaper, former Cuban President Fidel Castro tackled various subjects, including NATO, Stephen Hawking and the Big Bang theory.

The article is titled "Uncertain Future," according to Cuban News Agency. Castro's most negative comments in the piece were reportedly made against Jens Stoltenberg, the new NATO chief.

The former president wrote that Stoltenberg is determined to exterminate the Russians, EFE reports.

"How much hate in his face! What an incredible effort to promote a war of extermination against the Russian Federation! Who are more extreme than the Islamic State extremists themselves?" Castro wrote.

The 88-year-old also questioned the religious values of the organization.

"What religion do they practice? After this, will it be possible to enjoy eternal life at the right hand of the Lord?" Castro continued.

Before launching his attack on NATO, Castro postulated on human evolution. He also discussed Laura Mersini-Houghton, associate professor of Theoretical Physics and Cosmology at the University of North Carolina. The professor suspects there is more to the universe's creation than the Big Bang theory and does not believe in black holes.

"This, I believe, will come as a shock to many people who converted to such a theory in an act of faith," Castro wrote.

He added that Hawking is "the highest authority on this topic" and apparently read the scientist's 2001 book "The Universe in a Nutshell," in which he highlighted various points of interest.

Eventually, Castro plans to read Hawking's 1988 book "A Brief History of Time."

"I will do my best to read and understand the work, at a time when my current priority is related to large-scale, quality food production, an effort which can still result in important benefits," Castro explained.

In a different Granma article published Saturday, Castro praised the 461 Cuban medical workers who have gone to West Africa to fight the Ebola outbreak.

"May the example of Cuban's march to Africa also be in the hearts and minds of other physicians in the world, especially those with more resources," he wrote. "There are enough doctors on the planet so that nobody has to die for lack of care."

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Follow Scharon Harding on Twitter: @ScharHar.

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