The Cretaceous–Paleogene extinction event, formerly known as the Cretaceous–Tertiary extinction event, was a major mass extinction of three-quarters of the plant and animal species on Earth which occu
Discoscaphites iris, an ammonite from the Owl Creek Formation (Upper Cretaceous), in Owl Creek near Ripley, Mississippi
Rudist bivalves from the Late Cretaceous of the Omani Mountains, United Arab Emirates. Scale bar is 10 mm.
Tyrannosaurus was among the dinosaurs living on Earth before the extinction
Hell Creek Formation
Dinosaur
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Dinosaurs are a diverse group of warmblooded reptiles of the clade Dinosauria. They existed through most of the Mesozoic era, first appearing early in the Triassic period. They became the dominant ter
Cretaceous–Paleogene extinction event
…75%) of the plant and animal species on Earth which occurred around 66 million years ago. The event caused the extinction of all the non-avian dinosaurs and most other tetrapods weighing more than 25 kg (55 lb), excepting some ectothermic species such as sea turtles and crocodilians. It marked the ends…
Sinosauropteryxfossil
Brontosaurus excelsus remount in the Peabody Museum
Natural History Museum, London Stegosaurus