[N] 2006 Spinosaurus was the biggest
A study of two skull fragments of Spinosaurus by Cristiano Dal Sasso of the Civic Natural History Museum in Milan, Italy, and his colleagues published in the Journal of Vertebrate Paleontology, vol 14, p 888, revealed thst Spinosaurus was the biggest carnivore ever to walk the earth. The skull fragments are a snout the museum acquired from an Italian collector, and previously unidentified bones from the upper rear of the skull collected by the University of Chicago, both of which were originally unearthed in Morocco.
After measuring their sizes, Cristiano Dal Sasso estimates that the 99-centimetre-long snout came from a skull 1.75 metres long. From what is know of the body shapes of other spinosaurs, Dal Sasso calculates that the new Spinosaurus was 17 metres long and weighed 7 to 9 tonnes. The Tyrannosaur rex specimen known as Sue, kept at the Field Museum of Natural History in Chicago, measures 12.8 metres long and is thought to have weighed 6.4 tonnes when alive 67 million years ago, a reconstruction of a partial skeleton of Gigantosaurus, that lived in what is now Argentina indicated that it stretched 13.7 metres.