Bird

According to a dissertation on the cover of this week’s Journal edition, 73 million years ago, the same was true. Science. This article documents document the earliest example of bird nests in polar areas.

“The birds have been present for 150 million years,” said Lauren Wilson, a Master’s degree at Alaska Fairbank University. “They have been there for half a time, they have been nesting in the Arctic.”

The paper is the result of Wilson’s master thesis research in the UAF. Using dozens of small fossilized bones and teeth from Alaska’s excavation location, he and his colleagues identified several types of birds-diving birds, which were similar to birds, such as lone, birds, and several types of birds-who were raised in the Arctic.

Prior to this study, the initial famous evidence of birds born in one of the Arctic or Antarctic was about 47 47 million years ago, after which a Kishorgara killed 75 % of animals on the ground.

“This removes the record of birds in the polar areas for 25 to 30 million years,” the senior author of the paper, the director of the Alaska Museum of North, and Wilson’s adviser for his master’s degree, said Pate Dicken Miller. Birds are part of the museum collections.

“Arctic is considered a nursery for modern birds,” he said. “When you go to the field of creamer it is a kind of cool [a Fairbanks-area stopover for migrating geese, ducks and cranes]To know that they have been doing this for 73 million years. “

Wilson said, the only existence of a large repository of ancient birds is noteworthy, seeing how fragile the bird bones are. This is a double truth for the bird birds, which are destroyed and easily destroyed.

“Finding bird bones from Cretesees is already a very rare thing,” he said. “Almost is almost not heard to find Baby Bird bones. That’s why these are prominent.”

The fossils were collected from the Prince Creek Formation, located on the northern slope of Alaska on the banks of the river Colville, known for dinosaur fossils. Scientists identified more than 50 birds’ bones and bones.

“We kept Alaska on the map for birds.” It was not on anyone’s radar, said Dukin Miller.

This collection is a proof of the value of the extraordinary excavation and research point of view in the formation of the Prince Creek. Most of the exposure is focused on the recovery of the large bone bone.

Dukin Miller said that scientists who work in the formation of the Prince Creek make sure they get every bone and teeth, which they can appear to microscope. This technique, which includes the inclusion of the tubs scored for inspection under microscope back into the lab, has achieved numerous new species and unprecedented insights about dinosaurs, birds and acidic behavior and physiology that lived in Arctic during the Crytosis period.

From the age of dinosaur, we are now one of the best places in the nation for birds. “” In terms of information content, these little bones and teeth are interesting and provide an incredible depth of understanding of animals at this time. “

It remains to be seen whether the bones found on the river Colville are the early members of the neuranthais, including all the modern birds. Some new bones have skeleton properties that are found only in this group. And, like modern birds, some of these birds did not have teeth.

“If they are part of the modern bird group, they will be the oldest foes that are still found,” said Dicken Miller. Currently, the oldest such foams are about 69 69 million years ago. “But surely we will need to find a partial or complete skeleton.”

Other colleagues from this dissertation include Daniel Caspka, from the Bruce Museum, John Wilson from Princeton University, Jacob Gardner from the University of Reading, Gregory Ericson, from Florida State University, Donald Burkman, and Royal Ticker Museum, from the University of Royal Tille, and Vibelo. Colorado Bolder and Chris Organ from Montana State University.