Largest dinosaur footprint
Who
northwestern Western Australian sauropods
What
1.7 metre(s)
Where
Australia ()
When

The world's largest known dinosaur footprints are those of giant Australian sauropods, and were made public in March 2017. Discovered along the Kimberley shoreline on the northwestern coast of a remote region in Western Australia, the biggest of these prints measure 1.7 m long, big enough for most humans to be able to lie fully stretched out inside them. According to Steve Salisbury, a vertebrate palaeontologist at the University of Queensland, these tracks "indicate animals that are probably around 5.3 to 5.5 m at the hip, which is enormous”. Indeed, prior to their discovery, scientists were questioning whether anything as big as these exceptionally huge, long-necked, long-tailed dinosaurs could actually exist, which explains why the prints were initially overlooked, especially as they are only visible at low tide. They date from the first half of the early Cretaceous Period, approximately 130 million years ago, when the area containing them was a river delta.


Prior to the discovery of these Australian prints, the largest dinosaur footprints on record were the gigantic footprints of a large bipedal hadrosaurid ('duckbill'), measuring 1.36 m (53.5 in) in length and 81 cm (32 in) wide, which were discovered in Salt Lake City, Utah, USA, in 1932.

Other reports from Colorado and Utah refer to footprints 95–100 cm (37–40 in) wide. Footprints attributed to the largest brachiosaurids also range up to 100 cm (40 in) wide for the hind feet. The largest dinosaur tracks in Britain, both in terms of the number of prints and their size, were discovered at Keates Quarry, Worth Matravers, Dorset, in January 1997. At the junction of the Upper Jurassic and Lower Cretaceous period, 140 million years ago, a dozen sauropods, weighing about 30 tonnes, made over 100 saucer-shaped impressions, some just over 1 m (3.28 ft) in diameter.