Sauropod swimmers or walkers?

An international team of scientists, led by the China University of Geosciences in Beijing and including palaeontologists from the University of Bristol, has shed new light on some unusual dinosaur tracks from northern China. The tracks appear to have been made by four-legged sauropod dinosaurs yet only two of their feet have left prints behind.

Hundreds of giant dinosaur footprints found in Scottish lagoon

Were Sauropods Wading in China? The Institute for Creation Research

Recent study [link in comments] suggests that sauropods held a more upright position (red) than traditionally thought (white). The clue lies on their sacrum. : r/Dinosaurs

Did Dinosaurs Swim?, Science

Dinosaur Locomotion

Digit-only sauropod pes trackways from China – evidence of swimming or a preservational phenomenon?

A review and reappraisal of the specific gravities of present and past multicellular organisms, with an emphasis on tetrapods - Larramendi - 2021 - The Anatomical Record - Wiley Online Library

Swimming sauropods by T-PEKC on DeviantArt

When Dinosaurs Ruled The Mind #24: Trope-osaurus: Sauropod Swamps – whendinosaursruledthemind

Study of sauropod tracks shows the dinosaurs had a gait unlike any creature alive today

Sauropod water hi-res stock photography and images - Alamy