The late Triassic period (or early Jurassic), the world’s climate was warm, into crack not generated Marine produce moist wind, inland desert brings rainfall. Plants extend to once barren places, provided were widely distributed and numerous dinosaurs (including the most large dinosaur fossil of the animal) the food. The first was by a small dinosaur evolution of small birds flying in the sky.
Climate is warm and uniform than modern, but there are tropical, subtropical and temperate differences. The early and middle Jurassic to evaporates, aeolian sand dune as a representative of an arid climate zone appears in the panacea Midwest southern North America, South America and Africa, the late Jurassic extended to Middle-South Asia. Southern China, early Jurassic is tropical – subtropical humid climate environment, the middle Jurassic gradually become hot drought environment; In northern China, early and middle Jurassic warm and humid climate, warm and humid areas shrinked in the late Jurassic.
The minimum, so far found, dinosaur Mussaurus live in this period, according to the 1979 in a nest found with five or six youth Mussaurus fossil research, the plant-eating dinosaur larva length 20 centimeters, adult about 2-3 meters. Its head and limbs and eyes the proportion of the body is exceedingly great, the part is part of the fastest growth in the young Mussaurus. The young dinosaur fossil was named Mussaurusfor short tail, and a petite cat size quite. . However, scientists later found that adult rat dragon can reach 120 kilograms. Scientists carefully compared its juvenile dinosaur with adult Mussaurus, and found the fledgling Mussaurus has a larger head, large eyes and round nose. And adult Mussaurus have a smaller head and eyes, and have a long and narrow pointed nose.