For those who are interested, there are many sources for this story, giving different levels of detail, and making different claims. You can see some of them here:

https://news.ycombinator.com/item?id=6946928 (youtube.com)

https://news.ycombinator.com/item?id=6946485 (youtube.com)

https://news.ycombinator.com/item?id=6946366 (ethz.ch)

https://news.ycombinator.com/item?id=6943508 (theverge.com)

https://news.ycombinator.com/item?id=6942335 (thetechblock.com)

https://news.ycombinator.com/item?id=6941890 (digg.com)

https://news.ycombinator.com/item?id=5285021 (robohub.org)

Simple + interesting