which ranged from Alaska to northern Mexico

with implications for its maturation time and daily energy needs

Although the fossils found are fragmentary

ambushing its prey and using its speed and strength to bring it down

Ouranosaurus nigeriensis / Sarcosuchus imperator Yutyrannus huali which ranged from Alaska toThe scene takes place on the banks of an ancient river that meanders through a prehistoric landscape. The sun shines brightly in the clear sky, reflecting in the calm waters of the river. Three majestic Ouranosaurus nigeriensis, herbivorous creatures with a crest on their heads and a distinctive dorsal sail, cautiously approach the water's edge to drink and cool off in the heat of the day. However, the serenity is interrupted by a sudden movement in