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The general manager of a Burger King restaurant in Florida was told by a customer to "go back to Mexico" if he wanted to keep speaking Spanish.The exchange, captured in a video that was later posted on social media, shows Ricardo Castillo, who is of Puerto Rican descent, being berated by two unidentified women as they are eating in the restaurant in Eustis, 40 miles north of Orlando."You're in America, you should speak American English," one woman can be heard saying, to which Castillo replies "No ma'am, I don't." 531

The 2019 Nobel Prize for Medicine has been jointly awarded to William Kaelin Jr., Sir Peter Ratcliffe and Gregg Semenza for their pioneering research into how human cells respond to changing oxygen levels.Announcing the prize at the Karolinska Institute in Stockholm on Monday, the Nobel committee said that the trio's discoveries have paved the way for "promising new strategies to fight anaemia, cancer and many other diseases."The 2019 medicine laureates, the committee added, have identified molecular machinery that regulates the activity of genes in response to varying levels of oxygen.The importance of oxygen has long been established, the committee explained, but how cells adapt to changes in its levels remained unknown.Randall Johnson, prize committee member, described the trio's work as a "textbook discovery.""This is something basic biology students will be learning about when they study, at aged 12 or 13, or younger, biology and learn the fundamental ways cells work. This is a basic aspect of how a cell works and, from that standpoint alone, it's a very exciting thing."The winnersNew York-born Kaelin established his own research laboratory at the Dana-Farber Cancer Institute in Boston and became a full professor at Harvard Medical School in 2002.Semenza, also born in New York, became a full-time professor at Johns Hopkins University in 1999 and since 2003 has been the Director of the Vascular Research Program at the Johns Hopkins Institute for Cell Engineering.Ratcliffe, who was born in Lancashire, England, studied medicine at Cambridge University and established an independent research group at Oxford University, becoming a full professor in 1996. 1694

The number of measles cases in the US is now at 839 for the year, according to the US Centers for Disease Control and Prevention's 143

The government shutdown is approaching the two-week mark with no end in sight. And now that the holidays are over, its effects are becoming more apparent -- not just on federal workers' salaries, but on everything from science to beer.Here are some surprising impacts of the government shutdown:Low-income moms and their kids may not get nutritional assistance 373

The Chinese Ministry of Education has warned students to be careful if studying in the United States — the latest sign of deteriorating relations between the two countries.In its first "study abroad alert" of the year, issued on Monday, the ministry said students and academics must "prepare accordingly" if they wanted to study in the US."It has been the case for a while that some Chinese students who want to study in the US have been encountering visa restrictions, prolonged review times, shortened time validity and a rising rate of visa rejections," the ministry statement said."(This) affects Chinese students' successful study in the US."The ministry rarely issues alerts of this nature -- and when it does they often relate to one university rather than an entire country.The hashtag for the alert has gone viral since it was announced late Monday local time, and has already been read more than 21 million times on Chinese social media site Weibo.Ahead of the official statement, ministry International Cooperation and Exchange Department deputy chief Xu Yongji said education exchanges had become "increasingly complicated.""The US and the federal government have been politicizing the normal exchanges between the countries and suppressing China in the name of the China threat and infiltration theory," he said.In March, a group of Republican congressmen introduced a bill into the US Congress which would ban any individuals employed or sponsored by the Chinese military from 1503

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