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Allosaurus and its relatives were fierce and dangerous predators. Dinosaurs...More
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Yank! The giant panda strips bamboo leaves with its sharp claws. Weighing m...More
Hiss! King cobras slither across the ground, ready to strike. Engaging text...More
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Our modern world owes much to the ancient Greeks. Their ideas about philoso...More
From the beginnings of democracy to important scientific discoveries, the l...More
