It was the latest "sensational" discovery recorded in "Secret Knowledge: Rediscovering the Lost Techniques of the Old Masters".
He recently published his findings in a lavishly illustrated book, "Secret Knowledge: Rediscovering the Lost Techniques of the Old Masters" (Viking Studio) and participated in a BBC television documentary in which he demonstrated the use of lenses.
In his lectures, as well as in his new book, "Secret Knowledge: Rediscovering the Lost Techniques of the Old Masters," which accompanies a BBC documentary on the topic, Mr. Hockney pleads his case, with support from a University of Arizona physicist, Charles Falco.
In 2001, Mr. Hockney published an important book, "Secret Knowledge: Rediscovering the Lost Techniques of the Old Masters," which argues that advances in realism in Western art could not have been possible without the sly use of mirrors, camera obscuras and other optical devices.
On the subject of lenses and artists, ancient and modern, Mr. Kimmelman correctly notes that many art historians don't embrace the visual argument for the use of optics in David Hockney's recent book, "Secret Knowledge: Rediscovering the Lost Techniques of the Old Masters".
In some ways, Mr. Hockney's fascination with cameras as well as fax machines and computer-manipulated images may have reached a culmination in the current show as well as in his book "Secret Knowledge: Rediscovering the Lost Techniques of the Old Masters," to be published by Viking Studio in October.
The Consultant appreciates that the personnel of ECCD are a very committed group of human beings who, guided with much care and knowledge, will rediscover their enormous potential.
That Go-playing virtual intelligence was called AlphaGo Zero, and it managed to rediscover over 3,000 years of human knowledge around the game in just 72 hours.
When China rediscovers the connection between free thought, knowledge and political stability, then and only then can Mr. Kristof's prediction that "China may eventually lead the world again" come true.
As Frans de Waal has noted, Heck and Tratz's pioneering insights — they wrote that bonobos were less violent than chimps, for example — did not become general scientific knowledge, and had to be rediscovered.
