Gigantoraptor erlianensis stood more than 16 feet (five meters) tall and weighed a ton and a half, or roughly 1,400 kilograms. Featuring a toothless beak on its head and a short tail for balance, the enormous birdlike dinosaur measured more than 26 feet (eight meters) in length. Living more than 65 million years ago at the end of the Cretaceous period, this big bird precursor has complicated the seemingly shrinking descent from Archaeopteryx to the modern sparrow.
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