The latter represents the impact that caused the extinction of the dinosaurs. Between 1995 and 2000, Tony Yeates suggested magnetic patterns beneath the Murray Basin in New South Wales likely Carcharodontosaurus is one of the largest carnivorous dinosaurs known. At one point, scientists thought its skull might be the longest ever found. It was around 1.6 metres in length. The full animal could reach lengths of at least 12.5 metres - a size comparable to Tyrannosaurus. Giganotosaurus may have been even larger than both dinosaurs. A The heaviest animal ever? As soon as Perucetus' fossils were discovered in Peru's Ica Valley, it was immediately obvious that it was a very unusual species, even compared to the giant penguins and proto-whales which have previously been found in the region.. In total 18 bones were found, including 13 vertebrae, four ribs and part of the right hip. All of these bones are much larger than These dinosaurs were around 23 metres long and weighed 37.5 tonnes. 7. Austroposeidon. This dinosaur is the largest species to be discovered in Brazil. These titanosaurs roamed the Earth during the Cretaceous Era before going extinct around 70 million years ago. . Although it is only known from fragmentary remains, largest known land animals of all time, perhaps the largest, measuring 30-35 metres (98-115 ft) long and weighing 65-80 tonnes (72-88 short tons). It was a member of , the dominant group of sauropods during the Cretaceous. Argentinosaurus - long-heralded the Heaviest dinosaur - is known from only a small number of bones found in Argentina in the early 1990s. One vertebra (neck bone) was 1.59 m (5 ft 3 in) long, indicative of a giant sauropod, so to estimate its full size, palaeontologists compared it with vertebrae in the skeletons of more complete members of .

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