What evidence is there for the presence of air sacs in the skeletons of Triassic dinosaurs, similar to those in modern birds?

Jul 10, 2018 ... iant dinosaurs lived on Earth much earlier than previously thought, according to a team of excavators in Argentina who discovered the ... These incredible creatures dominated the planet through three major geological periods: the Triassic, Jurassic, and Cretaceous periods. Early dinosaurs in the ... paleontology, fossil record, mass extinction, volcanism, dinosaur evolution, Triassic period. Key Concepts. Life during the Triassic; Extinction at the end of ... Thalattosaurs are another type of ancient marine reptile that lived during the mid-late Triassic Period in what is now Alaska. They are not yet known from ... Feb 24, 1997 ... The fossil record reveals that dinosaurs first appeared in the Triassic Period, between 250 to 213 million years ago. It also indicates that ... The Mesozoic is divided into three time periods: the Triassic, Jurassic, and Cretaceous. ... The primitive dinosaurs of the Triassic were neither as abundant nor ... Sep 21, 2022 ... ... dinosaurs were in fact lizard-hipped. The results are reported ... Dinosaurs originated in the Late Triassic period, about 225 million ... Eoraptor is a small predatory dinosaur that lived during the Late Triassic period and is recognized as one of the earliest known dinosaurs. Among the first dinosaurs was the two-footed carnivore Coelophysis, which grew up to 9 feet (2.7 meters) tall, weighed up to a hundred pounds (45 kilograms), ... Nov 23, 2018 ... An elephant-sized mammal cousin lived alongside dinosaurs in Europe during the Triassic period, scientists have found.