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Stocks tumbled Friday as trade tensions between the United States and China heated up.The Dow closed down 572 points, a drop of 2.3%, after President Trump threatened to escalate a confrontation with China over trade. It fell as much as 767 points earlier in the day. The S&P 500 and the Nasdaq each declined more than 2%.Friday's losses wiped out gains for the week, and the Dow sank back into correction territory — 10% below its all-time closing high in January.Trump said late Thursday that he was considering tariffs on 0 billion more in Chinese exports, which would triple what the United States is already planning."The fear of a policy mistake on trade is increasing," said Art Hogan, chief market strategist at B. Riley FBR.All 30 companies on the Dow lost ground on Friday. Caterpillar, Boeing and Nike, giants with heavy exposure in China, were among the biggest losers in the index."The ratcheting up of trade tensions clearly carries risks. The tariff threats, even if only intended as bargaining tools, will be difficult to back down from if talks fail to deliver results," Capital Economics' Julian Evans-Pritchard wrote in a research note Friday.Anxiety returned to Wall Street after three days of gains. The VIX, a measure of market volatility, spiked 12%. CNNMoney's Fear and Greed index sank further into "extreme fear" territory.Wary investors had been holding out hope that the two sides will reach a deal before the proposed trade barriers go into effect.White House officials, including top economic adviser Larry Kudlow, have sought in recent days to soothe business leaders' fears of a trade war that would constrain economic growth.Earlier this week, the Trump administration announced plans for tariffs on billion worth of Chinese goods in retaliation for China's alleged theft of US intellectual property. Beijing fired back hours later by threatening tariffs on billion worth of US goods, including cars, planes and soybeans.The market had been interpreting Trump's proposed tariffs as negotiating tactics meant to extract concessions out of China rather than a rigid position. But Wall Street began to reassess that view as the administration sent conflicting signals throughout the day."We've gone from Larry Kudlow trying to calm the markets down to the administration saying, 'Hey, ignore the markets,'" Hogan said.In a radio interview Friday morning, Trump said, "I'm not saying there won't be a little pain, but the market has gone up 40%, 42%, so we might lose a little bit of it."Selling accelerated later in the day after Treasury Secretary Steve Mnuchin told CNBC, "There is the potential of a trade war."Investors had been operating under the assumption China and the United States were negotiating to avoid a trade conflict, but Mnuchin avoided questions about whether the two countries were actively talking."As no one came out to pull this back, there was a gradual realization that this was something that might be a little more serious," said Brad McMillan, chief investment officer for Commonwealth Financial Network.Analysts said the market also responded to comments from Federal Reserve Chair Jerome Powell.Powell said that the US economy was growing and a turbulent stock market would not change the Fed's course to gradually raise interest rates. The Fed is on track to raise rates three times this year, but it could speed up that process to cool down the economy."Markets are forced to confront the idea that rates are going up and the stock market is not going to derail that process," McMillan said.Stocks were mostly unaffected by the March jobs report, which showed that the US economy added 103,000 positions, down from a much bigger gain in February and well below what analysts were expecting.Wages grew 2.7% in March compared with a year earlier, in line with expectations. Investors were watching that number because it's a barometer of inflation. In February, an unexpected jump in wage growth set off inflation alarm bells and caused stocks to plunge.The combination of the hiring slowdowns and modest wage growth temporarily eased Wall Street's concerns that the economy was overheating.The yield on the 10-year US Treasury note, which has been steadily climbing as investors' inflation expectations rise, dipped to 2.78% after the jobs report."Investors breathed a sigh of relief," said Sam Stovall, chief investment strategist at CFRA Research. "Now we only have one issue to deal with, and that's trade."—CNNMoney's Paul R. La Monica contributed to this report.The-CNN-Wire 4564

The ability to regrow their tails has been a documented and life-saving skill of small reptiles like lizards and geckos. Now, researchers say they have details of larger reptiles, alligators, regrowing their tail.A team of scientists from Arizona State University and the Louisiana Department of Wildlife and Fisheries were surprised to discover the alligators have the ability to regrow their tails up to 9 inches. Their report was recently published in Scientific Reports.“Overall, this study of wild-caught, juvenile American alligator tails identifies a distinct pattern of wound repair in mammals while exhibiting features in common with regeneration in lepidosaurs and amphibia,” the researchers concluded.The wild-caught alligators most likely lost their tails by traumatic injury, the scientists stated. The team also had samples of regrown tails from alligators who had died."The regrown skeleton was surrounded by connective tissue and skin but lacked any skeletal muscle (which lizard tails do regenerate with)," Kenro Kusumi, co-senior study author and professor and director of ASU's School of Life Sciences and associate dean in the College of Liberal Arts and Sciences, told CNN.Even without muscles, a regrown tail is important for alligators’ survival.The team hopes their research will help scientists working on regenerative therapies in humans. Although humans are incapable of regrowing a limb, researchers said we have the same cells and pathways that alligators and other animals use for regeneration. 1532

The American Music Awards were Tuesday night.The following is a list of this year's nominees, led by rappers Drake and Cardi B with eight nominations each.ARTIST OF THE YEARDrakeImagine DragonsPost MaloneEd SheeranTaylor Swift *WINNER 242

States and districts across the country are unveiling their plans for the nation’s 56 million school children to return back to school. It’s a stressful time for parents and teachers, as well as students. Experts say it’s important to recognize the signs your child may not be ready to go back.“I really want to see friends and see teachers, and like, being actually inside the classroom,” said 14-year-old sophomore Amina Ahmad.Still, there is an uneasiness about whether a return to the classroom would lead to an outbreak.“Some people really are kind of worried about how many students are actually going back and how many people are going to be there,” said Ahmad.Politicians, school administrators, and parents are all weighing the potential risks of returning to the classroom. As novel coronavirus cases surge across the country, experts say the psychological toll on children needs to be addressed.“One of the things that we're seeing a lot is that after being away from that routine for a long time, it is normal for families and for youth to be concerned about ‘how is this going to be?’” said Dr. Tali Raviv, a child clinical psychologist at the Ann & Robert H. Lurie Children's Hospital of Chicago who specializes in student mental and health resilience.The American Association of Pediatrics says the benefits of in-person learning outweigh the risks and “…strongly advocates that all policy considerations for the coming school year should start with a goal of having students physically present in school.”But mental health experts say it’s important to understand how each child feels about going back.“Because it's a very different situation if a child is worried, ‘I'm not going to have my best friend with me in my little pod’ than if they're saying ‘I'm worried I'm going to get sick and die’ or ‘you're going to get sick and die,’” explained Dr. Raviv.Dr. Raviv says signs that your student is anxious about returning to school include:Any significant changes in sleep, falling asleep, staying asleep, not wanting to sleep alone or having nightmaresChanges in appetite or a lack of appetiteHeadaches or stomach achesBeing more irritable, frequent meltdownsWithdrawal from friends, family, other activitiesDr. Raviv says if the anxiety is debilitating, it may be time to see a professional.For sophomore Ahmad, her school’s hybrid schedule, alternating in-person and online classes, has put her mind at ease for now. 2448

Synthetic cannabinoids — often called Spice, K2 or fake weed — have been tied to 38 cases of severe bleeding, including one death, across Chicago and areas in central Illinois.All of those cases required hospitalization related to coughing up blood, blood in the urine, bloody nose, bleeding gums and other symptoms. Three cases tested positive for brodifacoum, or rat poison, according to a statement from the Illinois Department of Public Health on Saturday.Now, state officials are working to identify any common synthetic cannabinoid products related to those cases and to determine where the products were obtained.There are still many questions about the outbreak that need answers."This is the first time we've seen an outbreak of this magnitude in the area," Melaney Arnold, a spokeswoman for the Illinois Department of Public Health, said Monday."We're working with numerous different partners across the city and state as we investigate this outbreak," she said.Synthetic cannabinoids are sold in convenience stores, gas stations, drug paraphernalia shops, novelty stores and even online.Health officials warn that anyone who has a reaction to synthetic cannabinoids immediately should call 911 or be taken to an emergency department. 1267