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Maybe music artist Moby was right, and “we are all made of stars.” New research suggests the calcium in our teeth and bones came from star explosions.Researchers from Northwestern University looked at a calcium-rich supernova with x-ray imaging, which provided a glimpse into the last month of the star’s life and ultimate explosion.The findings, published in The Astrophysical Journal, suggest a calcium-rich supernova is a compact star that gives off an outer layer of gas as it’s dying. When it explodes, the star’s matter collides with material, emitting bright x-rays.The explosion is so intensely hot and high pressure, it allows nuclear fusion to produce a massive amount of calcium in mere seconds. Typically, a star creates a small amount of calcium slowly by burning helium.Half the calcium in the universe likely came from calcium-rich supernovae.“These events are so few in number that we have never known what produced calcium-rich supernova,” said Wynn Jacobson-Galan, a first-year Northwestern graduate student who led the study. “By observing what this star did in its final month before it reached its critical, tumultuous end, we peered into a place previously unexplored, opening new avenues of study within transient science.”The observed explosion was named SN 2019ehk in the Messier 100 galaxy. If that sounds a little too fantasy, just know it was 55 million light years from earth.“Without this explosion, you wouldn’t know that anything was ever there,” Margutti added. “Not even Hubble could see it.”The team was able to look at images from the Hubble Telescope of the area of SN 2019ehk before the explosion to compare before and after.The researchers are working on a follow-up study that includes how the supernova is evolving after the explosion, according to statements made to CNN. 1821

MEXICO CITY (AP) — Mexico has reached a deal with the United States to pay the shortfall in its annual contribution of water from border-area rivers, by transferring rights to water held in border dams that normally supply cities and towns downstream. The agreement announced Thursday allows Mexico to meet the Oct. 24 deadline which, if missed, could have endangered a cross-border water-sharing treaty that greatly benefits Mexico. Mexican officials said they still have enough water in other dams to satisfy drinking water requirements for border cities like Reynosa and Matamoros. 592

MEMPHIS, Tenn. (AP) — U.S. Supreme Court hopeful Amy Coney Barrett graduated with honors in 1994 from a small liberal arts school — Rhodes College in Memphis, Tennessee. But more than 1,500 alumni are not proud of their school's ties to the conservative lawyer and judge. They have posted a letter on social media expressing their opposition to Barrett's nomination to replace Justice Ruth Bader Ginsburg on the U.S. Supreme Court after Ginsburg's death last month. The letter came after Rhodes president Marjorie Hass praised Barrett for her academic record and her "professional distinction and achievement." The alumni letter criticizes Barrett's stances on abortion law and the LBGTQ community. 706

Medical experts in the private and public sector agree that the U.S. might see an increase in COVID-19 cases now that Thanksgiving has passed. The increase could impact tests, resources, and providers.“Healthcare professionals across the country are terrified of what might happen after Thanksgiving,” said Dr. Emily Landon, an infectious diseases expert at the University of Chicago.Dr. Landon is not the only medical professional who shares this perspective. Dr. Kiran Joshi works for the Cook County Department of Public Health, one of the largest counties in the country, and says communities are already feeling the impacts.‘’We are already seeing our systems for testing strained by the surge we are experiencing now,” Dr. Joshi said. “It should come as no surprise if people gather, those systems can experience additional strains.”The medical community fears the potential spike of infections will increase lines at testing sites, specifically in parts of the country with harsh winters. 1003

LOUISVILLE, Ky. (AP) — Police say 87 demonstrators who gathered at the home of Kentucky's attorney general to demand justice for Breonna Taylor have been arrested. News outlets report protesters with the social justice organization Until Freedom gathered Tuesday for a sit-in at the home of Daniel Cameron. Police say they were charged with the felony crime of "intimidating a participant in a legal process"; disorderly conduct, and trespassing. Taylor was fatally shot by police on March 13 during a narcotics investigation. Her death set off weeks of protests and calls for the officers to be charged. Among those arrested were Kenny Stills, a wide receiver for the Houston Texans, and Porsha Williams of "Real Housewives of Atlanta."Stills tweeted a picture of his mugshot. 785

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