濮阳东方医院治早泄技术权威(濮阳东方男科医院割包皮收费非常低) (今日更新中)

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

MADISON, Wis. — Faculty at the University of Wisconsin haved voted to eliminate spring break from the 2020-2021 academic calendar with the hope that doing so will prevent the spread of COVID-19.The University of Wisconsin-Madison Faculty Senate voted 140-7 on the 2021 spring calendar at a meeting Monday. The revised calendar eliminates spring break and starts classes a week later on Jan. 25.Classes now end April 30, the same day as the current calendar.Officials say dropping spring break would discourage students and staff from traveling long distances and bringing the virus back to campus.This story was originally published by Jackson Danbeck on WTMJ in Milwaukee. 681

Manufactured homes are making a comeback. Bloomberg reports since 2009, the homes have been on the rise. Many home buyers are turning to manufactured homes, because they are more affordable.Features that make them appealing to home buyers, include open floor plans, spacious kitchens and big bedrooms and bathrooms. “A lot of people are surprised when they come into our homes for the first time," says Phillip Dickson, with Clayton Homes. "It’s not what they are expecting.”However, there are a few things, aesthetically, that are different. There is a marriage line down the center of a manufactured home. When it’s assembled, it comes in two pieces. In recent years, Dickson says he’s seen an uptick in purchases. He says people are needing affordable housing in this competitive market. According to the National Association of Realtors, an average American home cost about 8,000. A starting price for a manufactured home, with no add-ons, can cost just ,000.When it comes to a manufactured home, there are many housing experts that say factory-built homes depreciate in value. However, Dickson says whether your home is manufactured or not, if you live in a great location, the value of your home will go up. Despite the value of a manufactured home, there are many buyers worried more about the home’s quality. But Dickson says the same requirements put in place for a site build home are still required for manufactured homes. Dickson hopes to break the stigma of how people view a manufactured home. He says if you’re looking to buy a home that you can customize, place where you want and keep it under budget, then a manufactured home might be your best choice.  1760

Mark Zuckerberg has a clear message for Congress in the wake of the Cambridge Analytica scandal: It's my fault.The Facebook CEO will take the blame for mistakes that led to the Cambridge Analytica scandal and lay out steps taken to prevent it from happening again, according to a copy of Zuckerberg's remarks as prepared for delivery to one of the committees before which he will be testifying. "It's clear now that we didn't do enough to prevent these tools from being used for harm as well. That goes for fake news, foreign interference in elections, and hate speech, as well as developers and data privacy," Zuckerberg said in the prepared remarks, which were released by the House Committee on Energy and Commerce on Monday."We didn't take a broad enough view of our responsibility, and that was a big mistake. It was my mistake, and I'm sorry. I started Facebook, I run it, and I'm responsible for what happens here."Zuckerberg is set to appear before a joint hearing of the Senate Judiciary and Commerce committees on Tuesday afternoon followed by a House Energy and Commerce Committee hearing on Wednesday morning.  1135

Market sentiment is so fragile that news of an arrest is enough to set off a selling wave.The Dow plunged as much as 785 points on Thursday. The index was recently down about 400 points, or 1.3%. The S&P 500 lost 1.1%, while the Nasdaq fell 0.3%.The arrest of Huawei CFO Meng Wanzhou in Canada at the request of the United States renewed doubts about the US-China truce.The latest sign of tension between Washington and Beijing also sent shudders through global markets. Hong Kong's Hang Seng plunged 2.5% overnight, while European stock markets declined sharply as well. Germany's DAX nearly closed in a bear market, down nearly 20% from its January closing high.Companies like Apple (AAPL) and Boeing (BA) that have significant exposure to China fell sharply. Other trade-related stocks like Broadcom (AVGO) and Harley-Davidson (HOG) were also under pressure. Alibaba (BABA), the Chinese e-commerce giant, tumbled 3%. The Dow and S&P 500 have once again turned negative on the year. The S&P 500, down 9% in the fourth quarter, is on track for its worst quarter in seven years.The arrest of Meng -- the daughter of the founder of one of China's most important companies -- serves as a fresh reminder that the United States and China remain in a trade war, despite the ceasefire reached last weekend in Argentina. Tariffs already imposed remain in place and new ones loom if talks fail to result in a breakthrough or at least an extension within 90 days."This comes at a truly delicate time," Win Thin, global head of currency strategy at Brown Brothers Harriman, wrote to clients on Thursday. "We think this will force China to take a more aggressive and confrontational approach with the US."  1720

来源：资阳报