History | Explained | Simply on Instagram: "A single photograph from the 1940s captures a moment the world was never quite ready to understand. Margaret Gibb leans into her fiancé, Carlos Daniel Josefe, sharing a private tenderness — while her conjoined twin sister Mary looks on. The Gibb sisters, born in 1912 in Holyoke, Massachusetts, were known to the public as “America’s Siamese Twins,” celebrated vaudeville performers whose lives were lived under constant scrutiny. Margaret met Carlos durin