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An educational display, likely part of a museum exhibit in Santiago, Chile, illustrates the Great American Biotic Interchange. The two-panel sign, titled "EL INTERCAMBIO" (The Interchange), features text in Spanish and graphic maps depicting North and South America. The left panel explains that the continents' isolation ended with the formation of the Isthmus of Panama about 3 million years ago, enabling significant faunal migration. Below this text, a stylized light blue map of North America shows silhouettes of animals such as bears, deer, wolves, llamas, and an elephant-like creature, with an arrow pointing towards South America. The right panel details the consequences of this interchange, noting the extinction of many unique South American forms, like meridiungulates and marsupials. It states that half of Chile's current mammal species, including pumas, foxes, and guanacos, are descendants of migrants from North America. The text also highlights the importance of Chile's fossil record for understanding this history. Below, a stylized light orange map of South America displays silhouettes of distinctive extinct animals, such as a giant ground sloth, an armadillo-like creature, and a toxodon-like mammal, with an arrow pointing towards North America. A small world map, highlighting North and South America, is at the top right of this panel. A person's leg and shoe are partially visible on the left side of the frame, indicating human presence near the exhibit.
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