Climbing Islands in the Sky in Search of New Species | Nat Geo Live

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The tepuis in South America, often called “islands in the sky” for their sheer cliffs and flat tops towering 10,000 feet above the jungle floor, create isolated environments that make these unique land formations evolutionary islands.There are unique species living on the tops of these mountains that exist nowhere else in the world. Often compared to the Galápagos Islands for being an ancient island chain with a stunning array of biodiversity, the tepuis are actually much older. While the Galápagos are thought to be around five million years old, it is estimated that the tepuis have been rising up for the past 20 to 40 million years, making them the oldest “islands” in the world.
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