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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

All fans will have the option to order food through the Dolphins app and receive SMS notifications when their order is ready to be picked up. pic.twitter.com/6Ebr0sq1eW— Miami Dolphins (@MiamiDolphins) August 24, 2020 225

A woman was removed from an American Airlines flight, reportedly because of language on a mask she was wearing.Arlinda Johns shared a video of the incident on her social media accounts at the end of the July. The video begins with her covering her original mask with another one as the plane she is on drives toward the runway.Her original mask read “F*** 12”, and she was asked by an airline attendant to cover it up because of the language.The number “12” in this use is a reference to law enforcement. Johns told Local 10 News she is an “abolitionist” and supports efforts to “defund and abolish the police.”She says after she put on the new mask, the flight attendant returned and told Johns, “I better not see that other mask.” Johns says she responded, “I said, ‘Leave me alone, lady.’ She stood there, she said, ‘okay, I got you.’”“Everything she asked me to do, I did,” Johns said in her video.The video shows the plane driving back to the gate in Charlotte and Johns being asked to leave the plane.During the conversation with security, Johns repeatedly asks not to be called sir and asks for an explanation why she is being removed. The gentleman does not elaborate and only says she has to get off the plane.Once inside the airport, Johns again asks why she was removed. Toward the end of the video, a gentleman escorting her away from the gate tells her she cannot get on another flight that day because of her “disruptive behavior.” 1453

Actress and filmmaker Asia Argento has found herself on the other side of the #MeToo conversation.The New York Times reported Sunday that months after publicly accusing Harvey Weinstein of rape, Argento made a deal with a young actor who accused her of sexual assault.Argento was among the first women to accuse now disgraced movie mogul Weinstein of sexual misconduct and has been a leading figure in the #MeToo movement.The New York Times says it has lawyers' documents showing that actor and musician Jimmy Bennett alleged Argento sexually assaulted him in 2013 when he was 17 and she was 37.According to the publication Bennett said the assault took place at a hotel in California, where the age of consent is 18. Bennett played Argento's son in the 2004 movie "The Heart Is Deceitful Above All Things." 815

After weeks of tensions, China and the United States have reached an initial agreement on trade.Both parties said in a joint statement on Saturday that China has agreed to "significantly increase" purchases of US goods and services, in order to reduce the trade imbalance between the two countries. This was a top demand of the Trump administration during two days of trade talks in Washington with Chinese officials."To meet the growing consumption needs of the Chinese people and the need for high-quality economic development, China will significantly increase purchases of United States goods and services," the statement said. "This will help support growth and employment in the United States."The pledge for more cooperation comes as the US and China, the world's two largest economies, have threatened tens of billions of dollars in tariffs that could lead to a trade war.Both sides also agreed to "meaningful increases" in US agriculture and energy exports, the statement said. The US intends to send a team to China to hammer out the details.The announcement did not put a dollar amount on the commitment from China.US officials on Thursday told CNN that Beijing had proposed boosting Chinese purchases of American goods by around 0 billion. But at a regular news briefing in Beijing on Friday, Chinese Foreign Ministry spokesman Lu Kang denied such an offer had been made. 1394