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sciencehabit quotes a report from Science Magazine: For decades, planetary scientists have pored over a mystery hidden within the Moon rocks retrieved by Apollo astronauts in the 1960s and '70s. Minerals in the rocks record the imprint of a magnetic field, nearly as powerful as Earth's, that existed more than 3.5 billion years ago and seemed to persist for millions of years. But generating a magnetic field requires a dynamo -- a churning, molten core -- and most researchers believed the Moon's tiny core would have long since cooled off, 1 billion years after it formed. Corroborating that picture are other ancient Moon rocks of about the same age that suggest the field was weak -- leaving planetary scientists baffled. Now, researchers are proposing a new way to solve the puzzle. A paper published today in Nature Geoscience theorizes that between 3.5 billion and 4 billion years ago, blobs of titanium-rich magma melted episodically just above the core, rising in plumes that drove volcanic eruptions on the surface. By intermittently stirring up the Moon's core, these bouts of melting would have caused the Moon's magnetic field to flicker on in short, powerful bursts. The paper "links a few different concepts that people were thinking about separately, but hadn't actually brought together," says Sonia Tikoo, a planetary geophysicist at Stanford University who was not involved in the study.

Rockchip RK3588 and RK3576 H.264 and H.265 video decoders gain mainline Linux support - CNX Software

Linux News - 13 hours 32 min ago

Rockchip RK3588 and RK3576 H.264 and H.265 video decoders gain mainline Linux support CNX Software

Categories: Linux

Sudo-rs just broke 46 years of security tradition, and users aren't happy - XDA

Linux News - 14 hours 16 min ago

Sudo-rs just broke 46 years of security tradition, and users aren't happy XDA

Categories: Linux

NASA Reveals Identity of Astronaut Who Suffered Medical Incident Aboard ISS

Slashdot.org - 14 hours 38 min ago

Longtime Slashdot reader ArchieBunker shares a report from NBC News: NASA revealed that astronaut Mike Fincke was the crew member who suffered a medical incident at the International Space Station in January, which prompted the agency to carry out the first evacuation due to a medical issue in the space station's 25-year history. The rare decision to cut a mission short and bring Fincke and three other crew members home early made for a dramatic week in space early this year. In a statement released by NASA "at the request of Fincke," the veteran astronaut said he experienced a medical event on Jan. 7 "that required immediate attention" from his space station crew members. "Thanks to their quick response and the guidance of our NASA flight surgeons, my status quickly stabilized," Fincke, 58, said in the statement. [...] In his statement, Fincke thanked his Crew-11 colleagues, along with NASA astronaut Chris Williams and Russian cosmonauts Sergey Kud-Sverchkov and Sergei Mikaev, who were also aboard the space station at the time and are still in space. Fincke also thanked the teams at NASA, SpaceX and the medical professionals at Scripps Memorial Hospital La Jolla. "Their professionalism and dedication ensured a positive outcome," he said. Fincke ended his statement by saying he is "doing very well" and still actively involved with standard post-flight reconditioning at NASA's Johnson Space Center in Houston. "Spaceflight is an incredible privilege, and sometimes it reminds us just how human we are," he said. "Thank you for all your support."