The idea of aquatic sauropods was rejected in the 1950s because their thorax would be under a column of water some 6 m or more, making it difficult or impossible to breath (Kermack, 1951). On a 1/4th the

source Amid the Mesozoic, or "Center Life" Period, life broadened quickly and mammoth reptiles, dinosaurs, and different massive monsters meandered the Earth. The period, which ranges from around