50 Most Secret Never To Know With Sea Turtles

Sea turtles are one of the Earth's most ancient creatures. The seven species which can be found today have been around for 110 million years, considering the time of the dinosaurs. The sea turtle's shell, or "carapace" is streamlined for swimming through the water. Not like the other turtles, sea turtles cannot retract their legs and head into their shells. Depending on the species their color varies between greenish, yellow and black. Green sea turtles can stay under water for as long as f...