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Amazon said that beginning Tuesday, customers at its two Amazon Go stores in Seattle can use a device that will scan their palms before entering the store that will sync to their credit card with their hand signature.The company announced the launch in a blog post."We believe Amazon One has broad applicability beyond our retail stores, so we also plan to offer the service to third parties like retailers, stadiums, and office buildings so that more people can benefit from this ease and convenience in more places," Dilip Kumar, Vice President Physical Retail & Technology at Amazon, said in the blog post.The way the contactless device Amazon One works is that customers will insert their credit card into the device, hover their hand over the scanner, and follow the prompts to associate the card with their palm signature built for them by the machine.The company said customers could use both palms or one to enroll. Once a consumer enrolls, they'll need to place their palm over the Amazon One device at the entrance.The company plans to add more of the devices in the coming months to other Amazon stores.Amazon says you don't need an Amazon account to use the Amazon One device.The company said the device "protected by multiple security controls and palm images are never stored on the Amazon One device," according to the FAQ on its site."The images are encrypted and sent to a highly secure area we custom-built in the cloud where we create your palm signature," Kumar said. 1499

After a group of demonstrators posted Fox News Host Tucker Carlson's home address on Twitter, the network stopped tweeting.It is seen as a silent protest from the network, according to Politico. The account has 18.3 million followers, which gives it a huge audience reach.Fox News hasn't officially said why it stopped tweeting. There have been no tweets from the largely followed account since Nov. 8.Politico reports 1.4 percent of FoxNews.com traffic in October came from Twitter, including all of the network's official accounts. That information comes from a tracker called SimilarWeb.Data shows nearly 70 percent of FoxNews.com traffic is from direct clicks on the website. Twitter may not be providing enough meaningful impact to the network's digital business, experts say. 809

After my discussions with VP Pence and others, the federal government has agreed to withdraw federal officers from Portland. They have acted as an occupying force & brought violence. Starting tomorrow, all Customs and Border Protection & ICE officers will leave downtown Portland.— Governor Kate Brown (@OregonGovBrown) July 29, 2020 349

Adam Levine is not giving up a great deal about reports that Maroon 5 will be performing at the next Super Bowl halftime show."I'm still formulating a lot of things," he told Variety in a recent interview.Reaction had been mixed to early reports the group would headline the halftime show.The NFL has not officially confirmed the entertainment lineup for the next Super Bowl."It's a Super Bowl tradition to speculate about the performers for the Pepsi Halftime Show," a league rep said in a statement earlier this fall. "We are continuing to work with (longtime sponsor) Pepsi on our plans but do not have any announcements to make on what will be another epic show."Levine was more open with the publication about getting superstar rapper Cardi B to record a verse on the hit Maroon 5 single, "Girls Like You.""I told Cardi, 'I want you to put something down that shows your fierceness as a woman and say it however you want,'" Levine said. "I knew she was going to murder this verse and bring the song to a whole new place. She was vital. I begged her to do it." 1077

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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