贵阳红胎记轻度如何治疗贵阳哪里医院治疗下肢静脉血栓好,贵阳红胎记去哪家医院比较好,贵阳治疗前列腺肥大医院,贵阳怎样治疗动脉闭塞性脉管炎,贵阳治疗脉管炎那边便宜,贵阳静脉血栓溃疡怎么治,贵阳治疗淋巴血管瘤哪个医院更好

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

ALPINE, Calif. (KGTV) - A fundraising campaign has been started to help an Alpine fire victim who gave up his chance to save his RV to help others.Jesus Mendoza returned home from work late Saturday afternoon to a towering wall of black and orange. Minutes later, fire crews arrived to tell him he had to evacuate."The smoke was really black, looked like an explosion behind the hillside," said Mendoza.For the past few years, he's been living in his RV on a property on Hidden Glen Road. He's been helping his landlord and friend since her husband passed away last year"She let me stay there. Made myself a promise that she comes first," said Mendoza.When it came time to evacuate, Mendoza says he helped his friend find boxes to pack, before helping round up her dog, cat, and 18 chickens from around her house. He then went to the home of a neighbor, who also needed help."She wasn't home. Helped retrieve her valuables, two dogs, and her vehicle," said Mendoza.The 40 minutes he spent helping would cost him. The RV needed gas and a battery, but he ran out of time. He and his landlord evacuated as the flames moved in. The next day, a neighbor sent him a video. Though his friend's home was spared, his RV was burned, along with his belongings. He had only grabbed a few photos of his kids and some clothes from the hamper. Also destroyed: his truck and a 1968 Ford Falcon he was restoring for his son. Remarkably, Mendoza says he's doing fine."Not upset, because I'm here, and those are just things," said Mendoza.Mendoza, who is a tree trimmer, says he is worried about losing all of his tools and climbing equipment. His friends starting a GoFundMe campaign. As of Thursday afternoon, it had raised more than ,700. Mendoza says he's beyond grateful."My mom taught me to treat others with the most respect, and it will come back to me. So thankful," said Mendoza.Mendoza didn't have insurance on the RV since it was not being driven. 1950

According to multiple reports, Amtrak is planning to furlough nearly 2,000 workers beginning Oct. 1.According to USA Today, the railroad company sent a letter to employees on Tuesday, detailing that 1,950 union workers and 100 management positions would be furloughed.In May, the company sent Congress a letter, stating it needed close to .5 billion in supplemental funds and disclosed plans to furloughing employees in the coming budget year.The New York Times reported that ridership has fallen by 95 percent since March, and projected revenue for 2021 declined by 50 percent. 588

A pharmaceutical that has already issued a recall for dozens of children's medications is expanding its recall to include more than a thousand additional medications for both humans and animals.The FDA reported earlier this month that King Bio had issued a voluntary recall for about 30 children's medications for a possible microbial contamination. Now, the company is expanding the recall to include more than 1,200 medications for adults, as well as medicine used by vets and pet owners.According to the FDA, King Bio still has not yet received any reports of illness from contaminated medicine. According to the FDA, the use of the drugs could potentially result in increased infections.Customers currently in possession of affected product should discontinue its use immediately and contact King Bio by email or call the company at 866-298-2740. The company also says it is notifying distributors and customers by letter.Below is a list of the contaminated medications. For more information on King BIo's children's medication recall, click here.ADULT MEDICATIONS 1106

A woman was accused of hiding stolen items inside her shirt at a North Carolina Staples last week, prompting the manager to call for a police officer only to find out the woman is pregnant with twins, WSOC-TV reported. According to WSOC's report, Sherell Bates was shopping for back to school items at a Staples office supplies retailer in Pineville, N.C. She told WSOC that during her transaction at the register, an officer approached to see what was under her shirt. "Initially, I thought he was joking, so my response was, 'Twins,’” Bates said. “I'm 34 weeks with twins. I'm having a boy and a girl." The officer didn't buy the story. "At that point, to avoid him asking me again, I actually lifted my shirt just a little bit, just to expose my belly, so he could see that I'm just a regular pregnant person buying school supplies,” Bates told WSOC.Bates said that when confronted, the manager admitted that they asked the officer to investigate her. Bates said she hopes that Staples will provide sensitivity training to its employees. On Monday, Staples said it had fired the manager involved in the incident. The following statement was given by the company to WSOC: 1226