<![CDATA[Screenshot from a Nils Berglund video showing a Bunimovich elliptical flower billiard. (Courtesy Nils Berglund)]]>

665711 image 1676055735 1676055735 <![CDATA[Screenshot from a Nils Berglund video showing a Bunimovich elliptical flower billiard. (Courtesy Nils Berglund)]]> 1278