the long-necked dinosaur was one of the largest animals to ever walk the earth with its legacy captivating children 's imaginations the world over .
the giant dinosaur and its evocative name - meaning ` thunder lizard ' - has enthralled generations of youngsters.but since 1903 , experts have believed the creature was originally misnamed .
but fossils that were originally labelled brontosaurus appeared different from two apatosaurus species .