Dakota (fossil)

Dakota (specimen NDGS 2000) is the nickname given to an important Edmontosaurus fossil found in the Hell Creek Formation in North Dakota. It is about 67 million years old,^[1] placing it in the Maastrichtian, the last stage of the Cretaceous period. It was about 12 m (40 ft) long and weighed about 7-8 tons.^{[1][dubious – discuss]}

The fossil is unusual and scientifically valuable because soft tissue including skin and muscle have been fossilized, giving researchers the rare opportunity to study more than bones, as with most vertebrate fossils. Preliminary research results indicate that hadrosaurs had heavier tails and were able to run faster than was previously thought.