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Sahara was 'most dangerous place' in Earth's history 100 mn yrs ago: Scientists

Researchers said that 100 million years ago, Africa's Sahara was the "most dangerous place" in the history of Earth, where "a human time- traveller wouldn't last very long". Reviewing fossils from south-eastern Morocco, they found three of the largest known predatory dinosaurs roamed the area. Among them was the 26-foot- tall sabre-toothed Carcharodontosaurus, which had 8-inch-long serrated teeth.

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