T. rex lived alongside early mammals, which were mostly small and nocturnal (active at night)!
Dinosaurs And Mythical Creatures - Facts for Kids

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Random Facts About Dinosaurs And Mythical Creatures For Kids
During the time of Stegosaurus, there were no grass or flowering plants yet — they ate mostly ferns, cycads, and primitive conifers!
Allosaurus had hollow bones like modern birds, which made it lighter and more agile despite its large size!
DNA hasn’t survived in Triceratops fossils, but we learn about them by studying their bones and comparing them to modern animals!
Allosaurus didn’t have the strongest bite, but it had a clever way of hunting! Instead of crushing bones like T. rex, it used its sharp teeth and powerful neck to slash at its prey, cutting deep wounds to bring them down.