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Sept. "Dreadnought" Dinosaur Most Complete Specimen of a Giant - "At 65 tons in life, Dreadnoughtus wouldn't be afraid of anything." It is more than massive as a Tyrannosaurus Rex. Its name is also a nod to the world's steel battleships.

Giant Sea Turtle, also called a Leatherback, is the largest of all living turtles. It can easily be differentiated from other modern sea turtles by its lack of a bony shell

Giant Sea Turtle, also called a Leatherback, is the largest of all living turtles. It can easily be differentiated from other modern sea turtles by its lack of a bony shell

Corythosaurus is a member of the group of duck-billed dinosaurs called hadrosaurs, which walked and ran on their two hind legs. The species’ strange skull is capped by a crescent-shaped helmet that contains extended tubes, which formed elaborate nasal passages. Collected in 1912 in Alberta, Canada, this Corythosaurus is among the finest dinosaur specimens ever found.

Corythosaurus is a member of the group of duck-billed dinosaurs called hadrosaurs, which walked and ran on their two hind legs. The species’ strange skull is capped by a crescent-shaped helmet that contains extended tubes, which formed elaborate nasal passages. Collected in 1912 in Alberta, Canada, this Corythosaurus is among the finest dinosaur specimens ever found.

Prehistoric marine reptile fossil has embryo inside - Polycotylus latippinus is a marine reptile which lived about 78 million years ago. The fossil, which is 15.4' (4.7 m) long, has an embryonic skeleton inside, including little ribs, 20 vertebrae, shoulders, hips and paddle bones, resolving the mystery of its reproduction (live birth). Scientists had long thought the creature was not built to crawl on land to lay eggs, but there was no evidence to support the theory

Prehistoric marine reptile fossil has embryo inside - Polycotylus latippinus is a marine reptile which lived about 78 million years ago. The fossil, which is 15.4' (4.7 m) long, has an embryonic skeleton inside, including little ribs, 20 vertebrae, shoulders, hips and paddle bones, resolving the mystery of its reproduction (live birth). Scientists had long thought the creature was not built to crawl on land to lay eggs, but there was no evidence to support the theory

Spinosaurus: Pending further discoveries, Spinosaurus is the current record-holder in the "world's largest carnivorous dinosaur" category: full-grown adults outweighed Tyrannosaurus Rex by about a ton and Giganotosaurus by about half a ton. Since so few Spinosaurus fossils are extant, it's possible that other individuals were even larger!

Spinosaurus: Pending further discoveries, Spinosaurus is the current record-holder in the "world's largest carnivorous dinosaur" category: full-grown adults outweighed Tyrannosaurus Rex by about a ton and Giganotosaurus by about half a ton. Since so few Spinosaurus fossils are extant, it's possible that other individuals were even larger!

This picture shows a reconstruction of an Argentinosaurus skeleton in a special exhibition of the Naturmuseum Senckenberg (a natural history museum in Frankfurt, Germany). Argentinosaurus was a massive Sauropod dinosaur from the mid Cretaceous Period (around 95 million years ago).

This picture shows a reconstruction of an Argentinosaurus skeleton in a special exhibition of the Naturmuseum Senckenberg (a natural history museum in Frankfurt, Germany). Argentinosaurus was a massive Sauropod dinosaur from the mid Cretaceous Period (around 95 million years ago).

Carcharodontosaurus: Carcharodontosaurus is a monstrous meat-eating Theropod dinosaur and considered larger than T-Rex. In fact, it is often called the African T-Rex, although there is no relation. The name means “Shark Tooth Lizard” and Carcharodon, from the Greek, is the shark genus with similar teeth.  It was 36-45 feet (12M) long and about 6-8 tons in weight and it may have been nearly 17 feet tall. The skull was 6 feet in length (Morocco, Algeria, Egypt, Libya, Niger, and Tunisia).

Carcharodontosaurus: Carcharodontosaurus is a monstrous meat-eating Theropod dinosaur and considered larger than T-Rex. In fact, it is often called the African T-Rex, although there is no relation. The name means “Shark Tooth Lizard” and Carcharodon, from the Greek, is the shark genus with similar teeth. It was 36-45 feet (12M) long and about 6-8 tons in weight and it may have been nearly 17 feet tall. The skull was 6 feet in length (Morocco, Algeria, Egypt, Libya, Niger, and Tunisia).

Triceratops, Greek for "three-horned face," only had two real horns-- the third, much shorter "horn" on its snout was actually made from soft proteins!

Triceratops, Greek for "three-horned face," only had two real horns-- the third, much shorter "horn" on its snout was actually made from soft proteins!

A girl is dwarfed by a model of an Indricotherium, the largest land mammal that ever lived, on display during the Extreme Mammals exhibition at the Fernbank Museum of Natural History in Atlanta, Georgia, USA

Pictures of the day: 6 March 2013

A girl is dwarfed by a model of an Indricotherium, the largest land mammal that ever lived, on display during the Extreme Mammals exhibition at the Fernbank Museum of Natural History in Atlanta, Georgia, USA

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