"Odd mass density" in one picture, rather than a thousand words ;) https://www.wooqian.com/publication/journal-article-pnas/featured.jpg https://www.wooqian.co

"Odd mass density" in one picture, rather than a thousand words ;) https://www.wooqian.com/publication/journal-article-pnas/featured.jpg https://www.wooqian.com/publication/journal-article-pnas/fea...