Puzzle to Solve T e ancient Sahara also puzzled scientists. Typical ecosystems have more plant-eaters than meat-eaters. Only one, or maybe two, apex predators can survive in an ecosystem. T at’s because when there are too many top predators, they all compete for the same food. T at’s mostly true today, and the fossil record shows it was mostly true during prehistoric times, too. Fossils show that this prehistoric ecosystem


crawled with predators. At the same time, paleontologists have found very few bones of plant-eaters there. T at seemed odd. What Ibrahim would soon learn about his mystery fossil might help to solve this puzzle.


This giant fl ying reptile grabbed fi sh, lizards, and baby dinosaurs in its long bill.


This T. rex-like dinosaur ruled the land.


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