Massive dinosaur tracks have been uncovered in a dried-up river bed amid a historic drought in Texas. Experts say the tracks belonged to a 60-foot, 44-ton dinosaur called the Sauroposeidon around 113 million years ago.
: Dinosaur Valley State Park
They were the largest animals to ever walk the Earth: sauropods, a dinosaur clade of such immense size and stature, they're sometimes dubbed 'thunder lizards'.
These towering hulks – including Brontosaurus, Brachiosaurus, and Diplodocus among others – needed four thick, powerful legs to support and transport their massive bodies. At least, most of the time. Perhaps.
Some mysterious, ancient tracks described in a 2019 study could offer fresh support for a disputed view in paleontology: that these lumbering giants sometimes got around on two legs, not four, belying what their quadruped status (and simple physics) would seem to demand.
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