贵阳不孕检查医院(贵阳妇科科那个比较好) (今日更新中)

After Columbine, it was hard to imagine things getting much worse.At the time, the shooting at a Colorado high school was the deadliest school attack in US history. But then came Virginia Tech, and Sandy Hook.With 13 victims dead, it was also one of the deadliest shootings overall. But then came San Bernardino, Orlando, Las Vegas and Sutherland Springs. 363

After a few weeks away, "Saturday Night Live" returned to take some shots at Fox News and President Trump.The NBC variety series kicked off with a cold open of Leslie Jones as Fox News anchor Harris Faulkner reporting alerts like just the word "Mexicans" and if former President Obama could be impeached. It then went to a joint press conference with Alec Baldwin's President Trump and leaders from the Baltic states."Let's make this quick," Baldwin's Trump said. "I have a lot of trade war to escalate here, OK? That's why I just announced tariffs on more Chinese products like fireworks and finger traps."The fake president also said that he expelled the "infamous Chinese billionaire P.F. Chang" and was now welcoming the leaders from the Baltic nations."Even in the game Monopoly, Baltic Avenue was always my favorite property," Baldwin as Trump said before reading a prepared statement to prove that he "can read."The joint press conference touched on many issues, including Baldwin's Trump reading his notes to not congratulate Russian President Vladimir Putin on his election win (which, of course, he did), calling one of the Baltic leaders a "gypsy woman" and zoning out during the conference."Oh my god, I'm already so bored," Baldwin's internal monologue as Trump said while the other leaders were talking. "I wish I was watching 'Roseanne.' How great is that show? Roseanne loves me. She's like a good Rosie O'Donnell."Baldwin's Trump also answered questions from reporters about topics like why he hates Amazon and its CEO, Jeff Bezos."I hate Jeff," Baldwin as the president said. "He's way richer than me and he admits to being bald so I feel threatened on two levels."But before the end of the press conference, the fake president had to deal with a giant Easter bunny that showed up."One more thing, does anyone else see this rabbit?" he said. "I'm not the only one that sees this rabbit, right?"Baldwin's Trump then welcomed the audience to "SNL" with the show's signature phrase, "Live ... From New York, it's Saturday night!" 2052

A mom in Port St. Lucie, Florida said she wants to know how her 9-year-old son wound up at the end of his bus route, miles away from home, without his bus driver noticing him fast asleep in the bus.“I understand children can fall asleep, but at the end of the route why didn’t she check?" Rebecca Council said. "Why did she drive miles and then he wakes up, he’s scared, he’s unsure of where he is. She’s alone with my child.”“I was just scared," Trevor Council said.Trevor got on the bus as normal Wednesday afternoon at Windmill Point Elementary, where he attends third grade."We put so much trust into the school system to take care of our children," Rebecca said.But then, Trevor fell asleep and missed his drop off at Newport Isles just after 3 p.m.Soon after, his mom got a frantic phone call from his stepmom saying Trevor hadn't come home from school."My heart immediately it felt like it dropped into my stomach," Rebecca said.Trevor's dad tried calling the school district and was told his bus had been running on time."The parents having to track down their child when we’re entrusting our school bus drivers with the safety of our children. We should not have to be the ones trying to track down the location of our children," Rebecca said.In the meantime, Trevor’s bus continued five miles away to the Mako soccer fields with Trevor fast asleep in a seat. He eventually woke up while the bus was parked there.“I stand up and say where was I and the bus driver was like, 'What?'" Trevor said. "She didn’t know I was still on the bus.”He said he wrote down his name for the bus driver and ended up being carted around another school’s route before being brought back to his own bus stop, just before 5 p.m.“No one bothered to call the father, the mother, stepmother, no one,” Rebecca said.After about 45 minutes, Trevor’s dad eventually got an answer from transportation.“The guy just told them he’s fine, he fell asleep," Rebecca said.But that answer isn’t enough. Rebecca said she wants to know how this happened.“I want to understand how that’s possible that the bus driver didn’t at least double check and make sure that every child was off the bus," she said.“I just don’t want it to happen to anybody else," Trevor said.St. Lucie County School District didn't respond by the end of the day Thursday to requests for comment. 2368

Airport security checkpoints can be among the worst things about air travel. Most of us would like to have the TSA Pre-Check so we can skip the long lines and the wait, but the cost to have it processed steers us away from this travel perk.If you have a trip coming up this year, there is some good news. There's a way to get a free TSA Pre-Check membership.Right now, there are at least 12 credit cards and 5 loyalty programs that will let you get a TSA Pre-Check membership for free.The credit cards include certain American Express cards, Bank of America premium rewards, Chase Sapphire and Expedia Voyager card from Citi.The loyalty programs include Marriott rewards, United Mileage Plus and Club Carlson. We found, while many of the credit cards cover the TSA Pre-Check fee outright, the loyalty programs pay for it with points.You also need to consider if there's an annual fee for the credit card and if the tradeoff is worth it.Of course anytime you sign up for a credit card and or loyalty program you'll want to read the fine print, but it could be worth your while to check out your options to save some cash, and some time, when you travel.  1199

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

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