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30+ extinct animals that vanished off the face of the earth

Earth looked much different not just millions, but even decades and centuries ago. Many animal species that once existed are ...
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Researchers complete ambitious project with near-extinct creatures: 'Their sounds are returning'

A magical conservation milestone is unfolding in Brazil's Atlantic Forest, where the vibrant call of red-browed amazons is echoing after decades of silence. Earlier this year, researchers released 20 ...