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发布时间: 2025-05-30 08:20:03北京青年报社官方账号
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  济南痛风做b超   

ALPINE (CNS) - A 55-year-old man died today on the Anderson Truck Trail east of El Capitan Reservoir near Alpine, authorities said.Cal Fire and units from the Alpine Fire District responded to a call for help to the scene of a remote area rescue at 10:20 a.m. Sunday, according to Capt. Isaac Sanchez of Cal Fire.People who were with the man in distress performed CPR and a paramedic took over life-saving efforts upon arrival, Sanchez said.The man was pronounced dead at the scene, the captain said. No other information about the cause of death was immediately available. 581

  济南痛风做b超   

After President Donald Trump commented on fundraising during his rally in Prescott, Arizona, ExxonMobil made sure to clarify what happened on Monday.WATCH TRUMP:According to CBS News, Trump referred to ExxonMobil while talking to a crowd, saying he could call on the company's executive to raise millions.ExxonMobil made sure that everyone knew that that call never took place." We are aware of the president's statement regarding a hypothetical call with our CEO…and just so we're all clear, it never happened." 520

  济南痛风做b超   

According to a monthly jobs report, the U.S. added 1.4 million jobs in August as the unemployment rate fell from about 10% to 8.4%.The unemployment rate is the lowest it has been since government-mandated shutdowns due to he coronavirus took place in March. Prior to the pandemic, unemployment sat at about 3.5%While Thursday's reports continue several months of positive economic news, some analysts believe the gains could be short-lived without another round of stimulus from Congress. Several provisions from the CARES Act, including increased unemployment benefits and bailouts for the airline industry, are already expired or are scheduled to expire in the coming weeks.This story is breaking and will be updated. 727

  

According to a recent paper, the Earth is caught directly in the crosshairs of a cosmic hurricane.A swarm of nearly 100 stars, accompanied by an even greater amount of dark matter, is aimed directly at our stellar neighborhood and there's nothing we can do to stop it; in fact, the vanguard is already upon us. This sounds like a perfect summer blockbuster movie, starring The Rock and Chris Pratt, or maybe Scarlett Johansson and Charlize Theron.Except this is for real. But is it a danger? Well, actually, no. Not at all. But it's potentially incredibly fascinating, with lots of interesting scientific interconnections. So, what is really going on?The story starts last April, when the Gaia satellite announced the locations and trajectories of 2 billion stars in the vicinity of the Milky Way surrounding our sun. They released the data to the public.Scientists were then able to look at the data set to see if they could spot anything peculiar. In galaxies like the Milky Way, the most common behavior is that the stars orbit the center of the galaxy in a manner broadly similar to the planets orbiting our sun. However, there are some stars that exhibit unusual motion. About a year ago, astronomers identified some "stellar streams" passing through our celestial neighborhood.One of them, called S1 (for stream 1), consists of nearly 100 stars of similar age and composition, orbiting the Milky Way in a direction exactly opposite that of normal stars. It's kind of like a handful of cars driving the wrong way down the highway, except with a much greater distance between them and with no likelihood of a collision. These stars are spread out over a few thousand light years and they will pass through the solar system's neighborhood over the course of a few million years.Astronomers identified S1 as being part of the remnants of a dwarf galaxy that collided with the Milky Way and was consumed in an epic episode of cosmic cannibalism. Dwarf galaxies are very small, typically about 1% the mass of the Milky Way. They can orbit larger galaxies and collide with the bigger galaxy, adding their mass to the parent. This is what appears to have happened in the case of S1, although the process has taken probably a billion years.Dwarf galaxies often have a disproportionately large fraction of dark matter. Dark matter is a hypothetical and still-undiscovered form of matter that interacts only gravitationally. Scientists have proposed its existence to explain many astronomical mysteries, for example the observation that most galaxies rotate faster than can be explained by the known laws of physics and the stars and gas of which they are composed.While dark matter has not yet been observed, hypothesizing its existence is the simplest and most economical explanation for myriad astronomical mysteries. Averaged over the entire universe, dark matter is thought to be five times more prevalent than the ordinary mass of stars and gas and planets.In dwarf galaxies, the fraction of dark matter is often higher. In Fornax, a well-studied dwarf galaxy orbiting the Milky Way, researchers estimate that the dark matter is between 10 and 100 times greater than the mass found in its stars.If that number holds for S1, the dark matter of the S1 stream is passing through the Earth at a much higher velocity than the more ordinary dark matter that orbits the Milky Way -- about twice as fast. It is thought that S1 dark matter is flying through the solar system at a speed of about 550 km/s, or about 1.2 million mph. While these numbers are impressive, they are misleading. Dark matter, if it exists, is extremely diffuse and it will have no discernible effect on the solar system.Because dark matter hasn't been observed yet, these velocity numbers are speculative, although they are strongly supported by a very large body of evidence. However, the prospect of high velocity dark matter flying through the Earth has suggested an opportunity to detect it.In a paper in the prestigious journal Physical Review D, researcher Ciaran O'Hare and his collaborators calculated the possibilities of discovering dark matter using both existing and proposed dark matter detectors. They considered two varieties of dark matter particles: a very heavy kind called a WIMP (weakly interacting massive particle) and a very light kind called an axion. Because the ultimate nature of dark matter is not known, it is important to be open to all possibilities.They found that the detectors they evaluated could find WIMPs for certain ranges of the particle mass. However, when they looked at the axion possibility, it appeared the prospects were even better. Because of its light mass and the manner in which an axion would interact with the detector, the apparatus simply has a better chance of seeing the axion. (If axions exist, of course.)Experiments with names like ADMX, MADMAX and ABRACADABRA are able or will be able to search for the signatures of dark matter proposed in the recent paper. They consist of technologies that are designed to interact with axions in a strong magnetic field and convert them to ordinary microwaves or radio waves that can be easily detected.It's important to remember that the S1 stream poses no credible threat to the Earth and humanity. There is no need for an action hero to save us. However, the synergy of science is staggering. A careful catalog of nearby stars has opened the prospect of a better possibility of finding and identifying dark matter, which is one of the great unanswered mysteries of modern physics. It's an amazing time we live in, in which we can study such things.\ 5625

  

AKRON, Ohio -- His bags were packed and his plans had been made. But a 27-year-old man known for his effervescence and strong work ethic didn't make it home Wednesday night, the day before he was set to start a new job in a new state. Friends and family of Clintin Churby, who worked at Summit Racing, remain shell-shocked after a wrong-way driver killed him Wednesday night in Akron, Ohio.Shortly after 8 p.m. Wednesday, a 63-year-old man driving a pickup truck entered I-76 heading the wrong direction—eastbound in the westbound lanes—when he struck Churby near the top of the Central Interchange, according to Akron police. Churby was pronounced dead at the scene. The other driver was taken to Cleveland Clinic Akron General Medical Center where his condition remains unknown. While the accident remains under investigation, police said it appears that alcohol may have played a factor in the fatal wrong-way crash.According to Churby's mother, Sandi, Clintin had just finished a half-day at work at Summit Racing in anticipation of a promotion and transfer to a facility in Texas. Wednesday was his last day."He had it together. He was going to his next adventure. We were supposed to cry all night because he moved to Texas," Sandi said. "Now, we're going to cry forever."Sandi began to sense that something might be amiss when her son didn't come home between 8 and 9 p.m., his expected arrival. She initially thought that maybe he was tied up at work still saying goodbye to his friends and co-workers. She called. She left voicemails. She fired off text messages.She was met with silence until a knock came on the front door."[Clintin] was a hard worker. He worked for a living. He didn't drink for a living. The irony..." Sandi said as her voice trailed off. "He was an innocent boy that was going places. It's not right. It's not right. Clintin made everybody smile. He was a happy boy. He was going places, literally."Not much is known about the driver that cause the fatal crash. As of Thursday evening, formal charges have not been filed against the man. Police said in a news release Thursday that the investigation remains ongoing."I want [the wrong-way driver] to hear how many people he hurt. It's uncalled for. He drove for over a mile the wrong way at 8 p.m. at night. How do you do that? How do you get in your car, 63-years-old and drunk? How do you do that?" Sandi said. "I almost wish he was younger so he could suffer longer in jail. He's not going to be there long enough."Earlier this month, Clintin's closest friends joined him at a local campground to celebrate his new job and his new opportunity. Those smile-filled photos are even more precious now as Clintin's family begins planning his funeral services.A GoFundMe has been set up in Clintin's name in order to help cover funeral expenses. You can find it by clicking here.This story was originally published by Jordan Vandenberge at WEWS. 2931

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