Paleontology

A new species of dinosaur, an ankylosaur, that lived 112 million years ago during the early Cretaceous of central Montana has been described by paleontologists writing in the Canadian Journal of Earth Sciences and the Bulletin of the Buffalo Society of Natural Sciences.

Ankylosaurs are the biological version of an army tank; they were protected by a plate-like armor with two sets of sharp spikes on each side of the head, and a skull so thick that even 'raptors' such as Deinonychus could leave barely more than a scratch.

Had you been swimming with the marine fossils that were laid down in the Eocene Epoch in Oregon, some 55 to 38 million years ago, you'd be treading water right up to where the Cascade Mountains are today. 

The Farallon Plate took a turn north some 57 million years ago, sweeping much of western coastal Oregon along with it. The Cascades were beginning to uplift and were fast becoming the breakwater for a retreating Pacific Ocean.

For several years, a European amateur science group was on the trail of dinosaur prints and last spring they made a significant discovery.

Dinosaurs, long hailed as the rulers of the Triassic almost lost the title belt to a group of crocodilian upstarts, the crurotarsans. In a short lived battle for survival, geologically speaking, the two groups ran head-to-head for about thirty million years.

The Crurotarsi or "cross-ankles" as they are affectionately known, are a group of archosaurs - formerly known as Pseudosuchians when paleontologist Paul Serono, the darling of National Geographic, renamed them for their node-based clade in 1991.

Archaeopteryx (Urvogel ) is the most primitive bird yet discovered.   Found in the 1860's, it has since been dated  to 150 million years ago but new microscopic imaging of its bone structure says this ancient critter grew less like what we think of as birds and more like dinosaurs.

The bones of more recent bird fossils like Confuciusornis from the Yixian Formation in China which are more recent than Archaeopteryx demonstrate rapid growth more similar to that of modern birds, which means rapid bone growth, considered a prerequisite for flight, was not necessary for taking to the air.

Tyrannosaurus rex has had an interesting few weeks - Raptorex kriegsteini, a man-sized ancestor, was unveiled a few weeks ago and now we find out that Alioramus altai—a horned, long-snouted, gracile cousin of Tyrannosaurus rex—shared the same environment with larger, predatory relatives.

Tyrannosaurs are bipedal predators that lived at the end of the Cretaceous (from 85 million years to approximately 65 million years ago) is currently known from several groups of fossils. One subfamily from North America includes Albertosaurus and Gorgosaurus, while the other subfamily bridges Asia and North America and includes Tyranosaurus, Tarbosaurus, and Alioramus.

Both T.

A 9-foot dinosaur excavated illegally from northeastern China and purchased by a private collector who brought it to the attention of paleontologists (hey, they'll return it after they're done)  is about the same weight as a grown human yet had still evolved all the hallmark anatomical features of Tyrannosaurus rex - except 30 million years earlier, according to a study in Science.

Raptorex displays the hallmarks of its famous descendant, Tyrannosaurus rex, like an oversized head, tiny arms and feet well-suited for running. The Raptorex brain cast also shows enlarged olfactory bulbs, like T. rex, indicating a highly developed sense of smell.

This guy Spillane has a quarry on his property in Illinois, and for years he's been selling limestone to landscaping companies. And for years, he's been seeing fossils in the rock--particularly, fossil cephalopods.