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At an estimated maximum length of 15 metres, Spinosaurus was the largest of all known theropod dinosaurs. Spinosaurus
This enormous, strange-looking theropod prowled the coastal plains of northern Africa, 108–98 million years ago. The shape of its teeth and jaw indicate that Spinosaurus included fish in its diet. A fossil of a partial skull has also been found with a fish vertebra lodged in one of the tooth sockets. The rivers and estuaries of northern Africa were teeming with the giant sawfish called Onchopristis and other fish. The sheer size of an adult Spinosaurus probably enabled it to prey on Onchopristis that could have been several metres in length, while at the same time giving it some immunity to attacks by Carcharodontosaurus.
© WA Museum
83–72 million years ago, Deinosuchus was the largest predator in North America. Deinosuchus
Deinosuchus riograndensis, an extinct giant relative of alligators, was the undisputed top predator in the rivers and estuaries along the east coast of southern Laramidia — a huge island that formed when the rising sea divided North America into several continental islands. From fossil remains it has been estimated to have grown to about 11 metres in length and weigh 6–7 tonnes, by far exceeding any modern alligator or crocodile. It was twice as heavy as the largest tyrannosaurs of its time and, as suggested by bite marks preserved on fossil bones, it preyed on dinosaurs. At this time there were also smaller-sized Deinosuchus, which may be of a different species, living along the southern and eastern coast of the island called Appalachia. The evidence that this Appalachian population commonly preyed on turtles include bite marks preserved on fossil turtle bones.
© WA Museum
Pinnacles Desert - Western Australia
Situated near Cervantes, about 180 km north of Perth Western Australia is a sandy desert containing one of the most unusual landscapes in Australia : the Pinnacle Desert. Out of the yellow, shifting sand rise thousands of huge limestone pillars known as the Pinnacles.
Rising up to five meters in height, he pinnacles display a vast array of shapes.