Fossils show gigantic ostrich-like dinosaurs roamed North America

Enormous ostrich-like dinosaurs in ancient North America were among the largest of its kind in the world, scientists have found.

Ornithomimosaurs in the ancient supercontinent of Laurasia grew to huge sizes, with researchers estimating that one of the individuals they examined weighed more than 800kg.

Scientists determined that the new fossils likely represented two different species of the
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