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Ten candidates are on the stage this time, down from 12 at the debate in October. Julián Castro, a former secretary of Housing and Urban Development, did not meet the party's qualification standards for this debate, and former Congressman Beto O'Rourke of Texas dropped out of the race.This debate arrives at a time of volatility in early-state polling. South Bend, Indiana, Mayor Pete Buttigieg faced increased scrutiny after a Des Moines Register/CNN/Mediacom poll showed him leading in Iowa, the first voting state. Former Vice President Joe Biden's campaign has suggested that he plans to use the debate to attack Sen. Elizabeth Warren of Massachusetts over her position on health care. And Sen. Bernie Sanders of Vermont remains firmly in the top tier of national and state polls.The other candidates participating in the debate are Sen. Cory Booker of New Jersey, Rep. Tulsi Gabbard of Hawaii, Sen. Kamala Harris of California, Sen. Amy Klobuchar of Minnesota, billionaire investor Tom Steyer and businessman Andrew Yang.Sanders on US health care spendingSen. Bernie Sanders said the US has a health care system "in which we spend twice as much as do the people of any other country."Facts First: This is not true. The US spent twice as much per capita on health care last year than the average for Organisation for Economic Co-Operation and Development (OECD) countries, but not twice as much as every single one of the organization's 35 other members.At ,586 per capita in 2018, US spending was well over twice the 1538

The moon is slowly shrinking over time, which is causing wrinkles in its crust and moonquakes, according to photos captured by NASA's Lunar Reconnaissance Orbiter.Unlike Earth, the moon doesn't have tectonic plates. Instead, as the moon's interior has cooled over the last several hundred million years, it has caused the surface to wrinkle as it shrinks. Unlike the flexible skin of a grape when it shrinks into a raisin, the moon's brittle crust breaks. This creates stair-step cliffs called thrust faults as part of the crust is pushed up and over another close part of the crust.There are now thousands of cliffs scattered across the moon's surface, averaging a few miles long and tens of yards high. The orbiter has taken photos of more than 3,500 of them since 2009. In 1972, Apollo 17 astronauts Eugene Cernan and Harrison Schmitt had to ascend one of these cliffs, the Lee-Lincoln fault scarp, by zig-zagging the lunar rover over it.Today the moon is 50 meters "skinnier" because of this process. And as it shrinks, the moon actively produces moonquakes along the faults. Researchers re-analyzed seismic data they had from the moon to compare with the images gathered by the orbiter.Data from the seismometers placed on the moon during the Apollo 11, 12, 14, 15 and 16 missions revealed 28 moonquakes recorded between 1969 and 1977. Researchers compared the location of the epicenters for those quakes with the orbiter imagery of the faults. At least eight of the quakes occurred due to activity along the faults. This rules out the possibility of asteroid impacts or rumblings from the moon's interior.This means that the Apollo seismometers recorded the moon shrinking, the researchers said. The study of Apollo seismic data and analysis of more than 12,000 of the orbiter's photos were published Monday in the journal 1841

The latest standoff between House Democrats and the Trump administration over the testimony of State Department officials has the White House raising fresh questions in a new letter sent Tuesday about why the House is not voting to authorize a formal impeachment inquiry.The White House and its Republican congressional allies have argued that such a vote is necessary, and President Donald Trump's lawyers told House Democrats in the letter that the President and his administration won't cooperate in the ongoing impeachment inquiry, arguing the proceedings amount to an illegitimate effort to overturn the 2016 election results. The lengthy letter all but dares House Speaker Nancy Pelosi to hold a formal vote opening an impeachment inquiry into Trump, though it does not explicitly call on her to do so.But Pelosi has said that Democrats don't need to take a vote and has shown little interest in doing so after she announced last month the House 964

The Dow Jones Industrial Average had its largest single-day drop in the market's history on Thursday.The Dow finished the day down nearly 1,193 points. The previous largest one-day drop for the Dow was on Feb. 5, 2018, when the index lost 1,175 points.The Dow has lost more than 3,500 points since Friday, marking one of the worst weeks for the market in the last calendar year. Three of the five largest single-day drops in Dow Jones history took place this week.Stocks have been falling amid fears of a worldwide slowdown due to the spread of COVID-19, better known as the coronavirus. Though 607

The Justice Department announced Thursday that the federal government will resume capital punishment for the first time since 2003.In a 148

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