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Study details meteorite diamonds from a lost planet

Study details meteorite diamonds from a lost planet

Science
April 17 (UPI) -- New analysis of a slice of a meteorite containing unusual diamonds suggest the space rock came from a long lost planet.In 2008, an asteroid measuring 13 feet across penetrated Earth's atmosphere and exploded above Sudan, scattering rocky fragments across the Nubian Desert. The fragments were gathered and organized into the Almahata Sitta collection.The Almahata Sitta fragments are ureilites, a kind of rocky meteorite containing clusters of tiny diamonds. Scientists believe ureilite diamonds can form three ways: under the extreme pressure triggered by a planetary collision, through chemical vapor deposition or under normal pressure conditions inside the parent body -- as most diamonds on Earth are formed.Over the last decades, several teams of researchers have studied the ...
Groups want details on Trump's approval of Keystone pipeline

Groups want details on Trump's approval of Keystone pipeline

Technology
Opponents of the proposed Keystone XL oil pipeline from Canada are asking a judge to force the U.S. government to turn over emails and other documents related to President Donald Trump's approval of the project. Environmentalists who sued to stop the 1,179-mile (1,800-kilometer) pipeline said the documents could bolster their case that Trump's decision was arbitrary and should be overturned by the courts. But U.S. Justice Department attorneys argued in court filings that the disputed documents include internal deliberations that don't have to be made public. They said the request amounts to a "fishing expedition" and should be rejected. Formal arguments were scheduled for Wednesday before U.S. District Judge Brian Morris in Great Falls. If the environmentalists prevail, the U.S. State Dep...
3D survey details dangerous megathrust fault off Costa Rican coast

3D survey details dangerous megathrust fault off Costa Rican coast

Science
Feb. 12 (UPI) -- Scientists have a better understanding of the dynamics of a dangerous megafault off the coast of Costa Rica, thanks to a new survey by researchers at the University of California, Santa Cruz.The survey yielded detailed 3D images of the Costa Rican subduction zone, where the Cocos plate sinks and slides under the Caribbean plate.Unlike similar megathrust faults, the Costa Rican fault features unusual earthquakes, patchy in their distribution. The ruptures rarely spread to shallow depths. Scientists believe the fault's odd behavior is explained by its varied textures -- corrugated patterns created by subduction activity."Our new imagery shows large variability in the conditions along the megathrust, which may be linked to a number of earthquake phenomena we observe in the re...
Study details the physics of a café latte

Study details the physics of a café latte

Science
Dec. 13 (UPI) -- New research by scientists sat Princeton University has revealed the physics underlying the delicious layers of a café latte."The structure formation in a latte is surprising because it evolves from the chaotic, initial pouring and mixing of fluids into a very organized, distinct arrangement of layers," researcher Nan Xue said in a news release.Xue is a grad student student working in the lab of Howard Stone, professor of mechanical and aerospace engineering at Princeton.Though inspired by an everyday drink order, Xue's investigation yielded insights into the layering of fluids -- insights that could have a variety of useful applications."From a manufacturing perspective, a single pouring process is much simpler than the traditional sequential stacking of layers in a strat
New research details impacts of youth football on the brain

New research details impacts of youth football on the brain

Health
Nov. 27 (UPI) -- Just a single season on the gridiron is enough to trigger measurable changes in the brains of some school-age football players.After a year of playing football, researchers found student athletes with a history of concussion and high impact exposure experience change to their default mode network, a neural network most active during wakeful rest. Decreased DMN connectivity has been associated with both traumatic brain injuries and mental disorders."The DMN exists in the deep gray matter areas of the brain," Elizabeth M. Davenport, a postdoctoral researcher at the University of Texas Southwestern Medical Center's O'Donnell Brain Institute, said in a news release. "It includes structures that activate when we are awake and engaging in introspection or processing emotions, wh...