 Because it is both one of the first dinosaurs described and one of the best @-@ known dinosaurs , Iguanodon has been well @-@ placed as a barometer of changing public and scientific perceptions on dinosaurs . Its reconstructions have gone through three stages : the elephantine quadrupedal horn @-@ snouted reptile satisfied the Victorians , then a bipedal but still fundamentally reptilian animal using its tail to prop itself up dominated the early 20th century , but was slowly overturned during the 1960s by its current , more agile and dynamic representation , able to shift from two legs to all fours . 
 Because it <a href='drop_aux' title='1'><mark>is</mark></a>both one of the first dinosaurs described and one of the best @-@ known dinosaurs , Iguanodon <a href='uninflect' title='2'><mark>has</mark></a> been well @-@ placed as a barometer of changing public and scientific perceptions on dinosaurs . Its reconstructions <a href='been_done' title='3'><mark>have</mark></a> gone through three stages : the elephantine quadrupedal horn @-@ snouted reptile satisfied the Victorians , then a bipedal but still fundamentally reptilian animal using its tail to prop itself up dominated the early 20th century , but was slowly overturned during the 1960s by its current , more agile and dynamic representation , able to shift from two legs to all fours . 
Because it both one of the first dinosaurs described and one of the best @-@ known dinosaurs , Iguanodon have been well @-@ placed as a barometer of changin public and scientific perceptions on dinosaurs . Its reconstructions done gone thru three stages : da elephantine quadrupedal horn @-@ snouted reptile satisfied tdaVictorians , then a bipedal but still fundamentally reptilian animal using its tail to prop itself up dominated thdaarly 20th century , but was slowly overturned during the 1960s by its current , more agile and dynamic representation , able to shift from 2 legs to all fours .