Megalonyx, Cenozoic Mammal
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Science History Images / Alamy Stock PhotoImage ID:
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4350 x 3337 px | 36.8 x 28.3 cm | 14.5 x 11.1 inches | 300dpiPhotographer:
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Megalonyx (great claw) is an extinct genus of giant ground sloths of the family Megalonychidae endemic to North America from the Hemphillian of the Late Miocene through to the Rancholabrean of the Pleistocene epochs. This animal appeared during Cenozoic era, the most recent era of geologic time, from about 65 million years ago to the present. The Cenozoic Era is characterized by the formation of modern continents and the diversification of mammals and plants. Grasses also evolved during the Cenozoic. The climate was warm and tropical toward the beginning of the era and cooled significantly in the second half, leading to several ice ages. Humans first appeared near the end of this era.