The debate whether dinosaurs went extinct due to a large space rock that struck the Earth over 65 million years ago may have been answered with the discovery of a distinctive brow horn from a Ceratopsian dinosaur just 13 centimeters below the K-T boundary.

By examining the type of rock in which dinosaur fossils were embedded, an often unappreciated part of the remains, scientists have determined that different species of North American dinosaurs from the Late Cretaceous period 65 million years ago occupied different environments separated by just a few miles.

By KEN ROGERS Dakota, the duck-billed hadrosaur discovered near Marmarth, isn't just any dinosaur. Rather, the plant-grazing early resident of North Dakota was mummified. Not just, excuse the expression, a pile of bones, the preservation of Dakota also included skin and tendons.

By TONY SPILDE, One of the rarest dinosaur fossils ever discovered - a scientific marvel that has already altered conventional wisdom - feels like a basketball. A little bumpy, but kind of smooth. Dimpled, is what you'd call it.

By Blake Nicholson Associated Press BISMARCK, N.D. -- Using tiny brushes and chisels, workers picking at a big greenish-black rock in the basement of North Dakota's state museum are meticulously uncovering something amazing: a nearly complete dinosaur, skin and all.