Dr. Stephen Roberts, director of the Oxford-Man Institute and professor of machine learning at the University of Oxford, tells Newsweek that the entire internet only recently matched the capacity of a single human brain.

"It wasn't until 2010 that the sum total of internet traffic exceeded a zetabyte, and that's just a single human brain," Roberts said.  

Roberts was speaking at Newsweek's Artificial Intelligence and Data Science in Capital Markets conference, in London, March 2.