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The plight of the planet's tortoises and turtles -- creatures that have roamed the Earth for 220 million years -- has never been greater, according to the newly released report "Turtles in Trouble: Top 25+ Endangered Tortoises and Freshwater Turtles ." It shows the world's 25 most endangered tortoises and freshwater turtles will become extinct in the next few decades without concerted conservation efforts.