Prehistory
Allosaurus: the common predator of the Morrison rocks
Allosaurus fossils are widespread in the Morrison Formation. Their number helps scientists study a Jurassic predator in much...
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Prehistory
Carnotaurus: the dinosaur whose skin left a pattern in stone
Carnotaurus is famous for its brow horns and tiny arms. Preserved skin also reveals a detailed pattern of...
Prehistory
Giganotosaurus: a giant hunter from ancient Argentina
Giganotosaurus lived in South America long before Tyrannosaurus rex. Its great size is impressive, even without giving it...
Prehistory
Dilophosaurus: the real animal behind the movie creature
The real Dilophosaurus was a large predator with two head crests. Fossils do not support its famous movie...
Prehistory
Therizinosaurus: giant claws that may have been for show
Therizinosaurus had extraordinarily long hand claws. Tests of their strength suggest that size did not make them good...
Prehistory
Deinonychus: the dinosaur that helped change an old idea
Deinonychus had grasping hands, a balancing tail and a large foot claw. Its skeleton helped challenge the idea...
Prehistory
Utahraptor: what a block of trapped dinosaurs can reveal
A huge block of rock holds Utahraptor bones of different sizes. Preparing them may reveal growth and anatomy,...
Prehistory
Ceratosaurus: the Jurassic hunter with a horn on its nose
Ceratosaurus is easy to recognise by its nose horn. Its fossil skull preserves the shape, while the horn's...
Prehistory
Acrocanthosaurus: the predator with a raised ridge along its back
Tall parts of the backbone gave Acrocanthosaurus its high-backed shape. The bones are clear, but the exact outline...