It's very likely that PCB is made in KiCAD seeing the fonts. I really really hope they make the project files available. That would be a sick example project.<p>Also, obligatory ꙮ
Direct link to the paper:<p><a href="https://www.science.org/doi/10.1126/sciadv.ads1176" rel="nofollow">https://www.science.org/doi/10.1126/sciadv.ads1176</a>
also discussed - <a href="https://news.ycombinator.com/item?id=43576559">https://news.ycombinator.com/item?id=43576559</a>