70 million years ago belonged to the late Cretaceous period of the earth. During that period, there were many fascinating dinosaurs, such as Tyrannosaurus rex, Triceratops and Ankylosaurus. In addition, many mammalian ancestors also appeared during that period, such as early members of the subclass Eotheria, as well as other species of reptiles, such as turtles, crocodiles, and lizards. In short, the biodiversity 70 million years ago was very rich, including various dinosaurs, mammals and reptiles.
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