The Cretaceous–Paleogene (K–Pg) extinction event[a] (also known as the Cretaceous–Tertiary(K–T)extinction)[b] was a sudden mass extinction of three-quarters of the plant and animalspecies on Earth,[2][3][4] approximately 66 million years ago.[3] With the exception of some ectothermic species such as sea turtles and crocodilians, no tetrapods weighing more than 25 kilograms (55 pounds) survived.[5] It marked the end of the Cretaceous Period, and with it the Mesozoic era, while heralding the beginning of the Cenozoic era, which continues to this day.
Wikiplacemarks.com
Android Apps
Placemarks
Login
Faq
Language
좋은 아이디어 있으시면 저희에게 알려주십시오.