CARLOS GOLDIN / SCIENCE PHOTO LIBRARY CARLOS GOLDIN / SCIENCE PHOTO LIBRARY
Biggest dinosaur, Argentinosaurus. Palaeontolo- gists Leonardo Salgado (left), Rodolfo Coria (centre) and assistant with the fossilized bones of Argentinosaurus huinculensis, the biggest dino- saur discovered to date. Argentinosaurus was found by Coria and colleague Jose Bonaparte at Plaza Huincul, Argentina, and has been dug up since the late 1980s. Only fragments of the 100-million- year-old skeleton have been found (shown here on a diagram) but comparisons with similar fossils suggest the animal may have weighed up to 100 tonnes. Argentinosaurus was a sauropod - a long- necked vegetarian that lived half under water to support its colossal weight. Photographed in 1995.
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