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Alex Trebek, the calm and witty host of "Jeopardy!" since 1984, has died at the age of 80. The game show shared the news of his passing Sunday morning. "Jeopardy! is saddened to share that Alex Trebek passed away peacefully at home early this morning, surrounded by family and friends. Thank you, Alex," they wrote on social media. 339

Activists in Louisville are calling for the cancellation of the 2020 Kentucky Derby due to increased racial tensions.This comes as several high-profile police shooting deaths, including Louisville EMT Breonna Taylor, have sparked nationwide protests. AP The Justice and Freedom Coalition held a news conference on Thursday renewing their call for a boycott of the Kentucky Derby due to the continued protests."Obviously, the Kentucky Derby matters more than a Black woman who was killed in her home for no reason at all," said Tamika Mallory, Until Freedom Founder. "We see you, Mayor Fischer. We see what you are doing and we understand the game. We are not a group of unstrategic young people that don't know what's going on. We understand the political implications of every move that you made ... we are not afraid."On Wednesday, Churchill Downs announced drastic changes to how many people can attend the race due to COVID-19 concerns. Derby officials expect no more than 23,000 people to attend this year's event, roughly 14% of the record-setting crowd of more than 170,000 in 2015.This story was originally reported by Jordan Mickle at WLEX. 1187

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

After spending months in jail for violating probation, rapper Meek Mill could be released as soon as today after the Pennsylvania Supreme Court ordered that he be granted bail.According to WTFX-TV in Philadelphia, the Supreme Court issued the order to the Court of Common Pleas in Philadelphia County to offer the rapper bail. WPVI-TV in Philadelphia also confirmed that Meek Mill, whose real name is Robert Williams, would be released."I’d like to thank God, my family, and all my public advocates for their love, support and encouragement during this difficult time," the rapper wrote on Twitter. "While the past five months have been a nightmare, the prayers, visits, calls, letters and rallies have helped me stay positive.""To the Philly District Attorney’s office, I’m grateful for your commitment to justice. I understand that many people of color across the country don’t have that luxury and I plan to use my platform to shine a light on those issues.""In the meantime, I plan to work closely with my legal team to overturn this unwarranted conviction and look forward to reuniting with my family and resuming my music career."  1155

After a difficult, monthlong journey from Central America to the US-Mexico border, dozens of asylum-seeking migrants are vowing to remain outside an immigration processing center until "every last one" is admitted into the country, an organizer with the caravan said late Sunday.Earlier, the migrants marched from Friendship Park in Tijuana, Mexico to the San Ysidro port of entry. They stood on the Mexican side; on the other side lay San Diego, California. It was the final leg for some in the caravan of hundreds of migrants, which had reached Tijuana on Tuesday.Alex Mensing, an organizer with Pueblo Sin Fronteras, which assembled the caravan, said 50 migrants were admitted to the immigration processing center on the Mexico side. However, that is incorrect. The migrants congregated on a bridge leading to the US border while waiting to be processed by American officials.Before the group arrived, US Customs and Border Protection officials said the port had already reached full capacity, and migrants trying to get into the United States may need to wait in Mexico as officials process those already in the facility.Some migrants said they had walked the last leg of the journey filled with anxiety. Others scarfed down food before they filed into the center, afraid there would be no food once they turned themselves in to border officials.One woman in a wheelchair said she was leaving a part of herself in Mexico. She didn't know where she was going, just that she was going to the United States, she said.In anticipation of the final march of a trip that has riled President Donald Trump, supporters lined both sides of the border on Sunday.The migrants say they want a better life for themselves and their children, safe from violence and poverty in their home countries. The caravan is both a humanitarian and an activist mission, as organizers created the event to draw greater attention to the migrants' plight.One such migrant is Gabriela Hernandez, a pregnant mother of two who fled Honduras and crossed Guatemala into Mexico to join the group heading north. She and her two sons left behind their friends and family and battled hunger and exhaustion along the monthlong journey."There are people who think I just woke up and said, 'Oh, I want to just go to the United States.' It's not that easy," she said.Isabel Rodriguez, 52, traveled with her two grandchildren, Anderson, 7, and Cristofer, 11, from El Salvador with the caravan over several weeks. She said she was grateful to be in Tijuana but was worried about what's ahead."I hear they are separating people who are not parents of children," she said, "but I am ready to get to the border."  2681