The city of Boston is staging its annual marathon. Kathrine Switzer became the first woman to officially run the race 45 years ago, despite stewards trying to physically force the 20-year-old off the road.
Fülöppite forms a homologous series with other members of the plagionite group. The structures of these minerals differ by the thickness of a galena sheet which occurs in all of them. Fülöppite has the thinnest such sheet.