The Chicxulub crater (IPA: [t͡ʃikʃuˈluɓ] ⓘ) is an impact crater buried underneath the Yucatán Peninsula in Mexico. Its center is offshore, but the crater is named after the onshore community of Chicxulub Pueblo. It was formed slightly over 66 million years ago when a large asteroid, about ten kilometers (six miles) in diameter, struck Earth.The crater is estimated to be 180 kilometers Pterosaurs included the largest flying animals ever to have lived. They are a clade of prehistoric archosaurian reptiles closely related to dinosaurs.Species among pterosaurs occupied several types of environments, which ranged from aquatic to forested.Below are the lists that comprise the smallest and the largest pterosaurs known as of 2022.. Restoration of two Arambourgiania Distinguishing Characteristics: Low-slung build; heavy armor; rather than an ankylosaur—meaning that it lacked a bony club at the end of its tail—Peloroplites was one of the largest armored dinosaurs of the middle Cretaceous period, almost 20 feet from head to tail and weighing as much as three tons. Discovered in Utah in 2008, this Triceratops, (genus Triceratops), large quadrupedal plant-eating ceratopsian dinosaur that had a frill of bone at the back of its skull and three prominent horns. Fossils of "three-horned face," as its Latin name is usually translated, date to the final 3 million years of the Cretaceous Period (145.5 million to 65.5 million years ago), making it one of the last of the non-avian dinosaurs The hippopotamus (/ ˌ h ɪ p ə ˈ p ɒ t ə m ə s /; pl.: hippopotamuses or hippopotami), also shortened to hippo (pl.: hippos; Hippopotamus amphibius), further qualified as the common hippopotamus, Nile hippopotamus, or river hippopotamus, is a large semiaquatic mammal native to sub-Saharan Africa.It is one of only two extant species in the family Hippopotamidae, the other being the pygmy Installing the dinosaur inside its new home was the most nerve-racking aspect for Norrell. The skeleton only just managed to fit vertically; the roof is 19.4ft high, while the top of the dinosaur 3yR1.

how heavy was the heaviest dinosaur