Today I learned

I don't like the guy, I just found this on YouTube and decided to share it

In 1967, Sir David Attenborough was in charge of BBC2’s coverage of Wimbledon. The event was being televised in color for the first time, and he decided to change the tennis balls from white to yellow for easier visibility when they crossed the white pitch lines. It caught on, and now almost all tennis balls are yellow.

CNN Article on the topic

Is this a common knowledge? Is this an old feature? I accidentally found about it few days ago.

Jean-Pierre Luminet calculated all of that back in 1979 using the IBM 7040 mainframe, an early transistor computer with punch card inputs. The machine generated isolines for his image that were "directly translatable as smooth curves using the drawing software available at the time," he told Engadget in an email.

To create the final image though, he relied on his other passion: art. Using numerical data from the computer, he drew directly on negative image paper with black India ink, placing dots more densely where the simulation showed more light. "Next, I took the negative of my negative to get the positive, the black points becoming white and the white background becoming black."

https://www.engadget.com/2017-04-19-black-hole-image-jean-pierre-luminet.html

Evans was all over Peter Jackson's Get Back documentary, efficiently keeping the machine running in so many ways: fetching food, and cigs, writing down lyrics during songwriting sessions, somehow coming up with an anvil for Maxwell's Silver Hammer, arranging for George Harrison to get new shoes, and on and on. Hard to understand why none of the Beatles attended the funeral, though George Martin did show up.