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Along with the ornaments and strands of lights, two police officers in the 4th precinct of Minneapolis' Police Department added some unusual items to their lobby's Christmas tree: A collection of street trash, including packs of Newport cigarettes, a crumpled bag of Takis chips, a cup from a Popeyes fried chicken outlet, a can of Steel Reserve malt liquor and some yellow crime scene tape. Critics say the items chosen play on negative stereotypes about African-Americans."These pieces of trash were deliberately chosen to represent how certain officers feel about the community they serve: that Black people are a stereotype to be mocked and the lives of those they serve may as well be reduced to trash in the gutter," City Councilman Phillipe Cunningham said on Facebook. The department has since placed the officers on leave and has launched an internal investigation amid an outcry that the decorations mocked the precinct's predominantly black neighborhoods. The precinct commander also was demoted, according to the Star-Tribune.Minneapolis Mayor Jacob Frey called the tree "racist" and "despicable." On Friday, he vowed the officers responsible would be fired."Shifting the culture of the police department requires swift and decisive action," he said. "Termination is necessary -- both to discipline the officer and to send a clear message."A spokesman from the mayor's office has since walked back parts of that statement, acknowledging that the fate of the officers responsible will take some time to determine."Every day I work to bridge the divide between the police department and the community, as do so many others in our department," said Minneapolis Police Chief Medaria Arradondo in a statement. "The culture of the Minneapolis Police Department has undergone positive change, however as this recent incident shows we still have much work ahead."Three years ago, the department was heavily criticized for the fatal police shooting of Jamar Clark, a 24-year-old African-American, during a scuffle with white officers. An internal investigation concluded in 2016 that the officers involved did not violate any department policies, and they were not disciplined. 2188

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

A years-long battle between the Cornwall-Lebanon, Pennsylvania School District and social studies teacher Luke "Todd" Scipioni finally came to an end this week when a court ruled that Scipioni can return to work, the Lebanon Daily News reported. School officials learned in 2014 that Scipioni had sex with a female student on her graduation night in 2004. The allegations surfaced during Scipioni's divorce proceedings, the Daily News reported. The Daily News reported that Scipioni and the student developed a relationship during the 2003-04 school year, but it did not turn sexual until student's graduation. The relationship ceased when she went off to college at the end of the summer. The district then fired Scipioni in October 2014 when it confirmed the relationship between Scipioni and the student. Scipioni then challenged the district in court, with an arbitrator’s ruling that Scipioni was not forthcoming in the details of the relationship, and that he should be suspended for one year, but not banned from teaching. This week, the Pennsylvania Supreme Court ruled that Scipioni should not have been punished beyond the suspension, and is entitled to return to his job.Scipioni is reportedly interested in returning to work for the district after he and the district settle on back pay. A district spokesperson said that while it disagrees with the ruling, it will abide by the justices' ruling. 1546

A well-known General Mills food brand is now selling sweaters.Pillsbury has released its first-ever Pillsbury Ugly Christmas Sweater holiday line. The wearables have wintery themes and bright colors and feature the brand's icons, the Doughboy and crescent rolls.The sweaters were available at UglyChristmasSweater.com, but sold out in just a couple hours after going up for sale Wednesday, Dec. 5. However, there is still a chance to get a sweater (today only) through a sweepstake at Pillsbury.com/bakememories.Options include: 546

Across the West Coast, entire towns are being leveled by historic wildfires, and one northern California county is facing this horror for the second time in two years.Berry Creek’s hilly terrain is still smoldering, as homeowners anxiously wait to be let back into the area, although many already know they don’t have homes to come back to.“When they see the smoke or hear about a fire, their PTSD, whether you’re civilian or former military, it kicks in,” said resident Michael Zylstra, who evacuated from his home.Steve Kaufmann, the public information officer for the California Department of Forestry and Fire Protection, compared the fires to a freight train.A freight train of fire, swallowing everything in its path.“When we have a fire like this, it makes for number one, explosive, but we are seeing erratic fire behavior we’ve never seen in our career,” Kaufmann said.Fires so erratic it’s capable of leaving a town unrecognizable.Michael Zylstra says his aunt and uncle won’t have a home to come back to. Miles of Berry Creek homes have been reduced to rubble.“It’s a scenario where the vegetation is completely bone dry,” he described.The town is a casualty of the North Complex Fire. Fueled by years of drought and extreme winds, it’s burned over 260,000 acres in northern California.“It took a huge toll on the community,” Kaufmann recalled. “It hit because it moved so fast, and we just didn’t have the resources to put in there to defend every structure involved.”With resources spread across 28 major fires, Kaufmann says it’s a challenge the state has had to adapt to.“We’re always prepared for the worst-case scenario,” he said. “This is probably definitely one of the worst cases we’ve seen in years.”Zylstra evacuated his home six days ago in the nearby town of Cherokee. As he waits for news, he helps fellow veterans cope with the trauma.“It’s been stressful,” he said. “They’re anxious, they get nervous, they don’t know what to do, they can’t sleep.”In large part because the community went through this nearly two years ago when the Camp Fire ripped through paradise killing 85 people and destroying nearly 19,000 structures.“It’s very painful memories for a lot of them,” Zylstra said.It’s painful for many to rebuild.“[In] a lot of people’s eyes, it will never be what it was; it will never ever be what it was in 20-30 years, what it used to be,” he said.And now, another town must also try and navigate life forever changed by fire.“We just need to all work together for that one common goal, to take care of each other,” Zylstra said. 2573