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Quetzalcoatlus (/ k ɛ t s əl k oʊ ˈ æ t l ə s /) is a genus of azhdarchid pterosaur that lived during the Maastrichtian age of the Late Cretaceous in North America. The type specimen, recovered in 1971 from the Javelina Formation of Texas, United States, consists of several wing fragments and was described as Quetzalcoatlus northropi in 1975 by Douglas Lawson.
Lawson began his synecological research during his master's degree studying the paleoecology of the Tornillo Formation in Big Bend National Park, Texas.During his study of this Late Cretaceous intermontane basin community, he discovered the fossil remains of the giant pterosaur, Quetzalcoatlus Northropi, which he named in honor of John K. Northrop because of its similarity to Northrop's flying ...
Examples of Clovis and other Paleoindian point forms, markers of archaeological cultures in North America. The Solutrean hypothesis on the peopling of the Americas is the claim that the earliest human migration to the Americas began from Europe during the Solutrean Period, with Europeans traveling along pack ice in the Atlantic Ocean.
Up to 50,000 people, or one-tenth of the emigrants who attempted the crossing continent, died during the trip, most from infectious disease such as cholera, spread by poor sanitation: with thousands traveling along or near the same watercourses each summer, downstream travelers were susceptible to ingesting upstream wastewater including bodily ...
However, the pterosaurs had to share the skies with some remarkable flying dinosaurs like Microraptor. From these feathered flyers evolved the birds, who survived the K-Pg mass extinction. Some, like the swans, could gracefully fly at 30 mph as David Attenborough shows when he tracks their progress on a boat.
In July 1952 that ship made the crossing in 3 days, 10 hours, 40 minutes. Cunard Line's RMS Queen Mary 2 is the only ship currently making regular transatlantic crossings throughout the year, usually between Southampton and New York. For this reason it has been designed as a proper ocean liner, not as a cruise ship.
The photo depicts a congregation of tactically outfitted alligators, allegedly en route to the U.S.-Mexico border. Louisiana National Guard on the way to help Texas secure the border. pic.twitter ...
Cast of an assigned wrist bone. The first pterosaur remains from Romania were identified by Franz Nopcsa in 1899, and the first remains of Hatzegopteryx were found during a student dig in the late 1970s from the upper part of the Middle Densuş Ciula Formation of Vălioara, northwestern Hațeg Basin, Transylvania, western Romania, which has been dated to the late Maastrichtian stage of the ...