Deinonychus was a medium-sized theropod dinosaur, measuring about 3 meters long and weighing around 100 kilograms. It had a sleek, agile build with a long, stiff tail for balance. Its most ...

The other tracksite discovered by the expedition team includes footprints from early sauropods and theropods. One of the tracks, consisting of three consecutive large theropod footprints ...

One species of spinosaurid was even larger than T. rex. PLOS One. A new oviraptorosaur (Dinosauria: Theropoda) from the end-Maastrichtian Hell Creek Formation of North America PLOS One. A new ...