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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

Michelle Obama's brother Craig Robinson has been named the executive director of the National Association of Basketball Coaches.Robinson is leaving his job as the New York Knicks' Vice President of Player Development and Minor League Operations, a position he's held since 2017, to take over for Jim Haney, who held the NABC position for 29 years.“I’m extremely honored and excited for this tremendous and vital opportunity,” said Robinson in a press release. “I’d like to thank the NABC, our Board of Directors, President Jamie Dixon, and the search committee for selecting me at such an important time for our membership, our players, and our game. I look forward to the challenges ahead.”Robinson is now the fifth executive director in the association's history.“Craig encompasses everything we were looking for and more in the next leader of the NABC,” said Dixon, the head coach at TCU and 2020-21 NABC President in the release. “Craig’s experiences as a decorated student-athlete, an accomplished coach, and a high-level administrator uniquely position him to lead our association during this crucial moment in time for basketball. Given his background, education, and values, we have exceeded expectations from when we started the search. We’re confident that Craig will be an ally for coaches from all levels of our sport, and will continue to strengthen the collaboration between the NABC and the NCAA, the NBA, high schools, grassroots organizations, and numerous other key stakeholders,” Dixon added. “I would also like to thank Glenn Sugiyama and DHR International for supporting our search process.”Robinson formerly served as the head basketball coach at Brown and Oregon State. 1701

Mark Kelly, a former astronaut and husband of former Rep. Gabrielle Giffords, was sworn in as a U.S. senator on Wednesday afternoon.Kelly, a Democrat, defeated Sen. Martha McSally in a November special election. McSally had been appointed by Gov. Doug Ducey to serve in the seat once occupied by Sen. John McCain, who died in 2018.Because Kelly was elected in a special election, he is being sworn in ahead of newly-elected Senators, who will assume their roles early next year.Kelly's seat is one of three Democrats flipped on election day, while Republicans were able to flip one seat back into their control. Control of the chamber remains dependant on the outcome of two runoff elections in Georgia, which will take place in January.During his NASA career, Kelly flew four missions to space and totaled more than 54 days outside of the Earth's atmosphere. His twin brother, Scott, is also an astronaut.Kelly's first foray into politics came via his wife. Giffords was first elected as a congresswoman in 2006, but in 2011, a gunman shot her in the head during an assassination attempt. She survived the shooting but resigned her seat in early 2012 to focus on the recovery.Kelly is at least the second former astronaut to serve in the U.S. Senate, following in the footsteps of John Glenn, who was the first man to orbit the earth and served as a senator representing Ohio from 1974 to 1999. 1403

MEXICO CITY (AP) - A magnitude 5.9 earthquake shook the southern Mexican state of Oaxaca on Monday, days after a more powerful temblor hit the same area. 161

Meat-based idioms, like "flogging a dead horse" or "taking the bull by the horns," can be compared with homophobic and racist language, according to animal rights organization PETA."Just as it became unacceptable to use racist, homophobic, or ableist language, phrases that trivialize cruelty to animals will vanish as more people begin to appreciate animals for who they are and start 'bringing home the bagels' instead of the bacon," PETA said on Twitter.The group took to Twitter Tuesday, offering a graphic showing some possible alternatives to meat-related expressions.Instead of "kill two birds with one stone" say "feed two birds with one scone," and instead of "being the guinea pig," say "be the test tube," PETA said."Words matter, and as our understanding of social justice evolves, our language evolves along with it," it added.The comparison with racism and homophobia was met with anger on Twitter, with some arguing that PETA was trivializing race and gender issues.Others said the animal rights organization was giving vegetarians and vegans a bad name.PETA's tweet comes after a UK-based academic argued last month that an increased awareness of vegan issues may lead to new modes of expression. 1220

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