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Supreme Court Chief Justice John Roberts was sworn in Thursday to preside over impeachment trial of President Donald Trump on Thursday, beginning the third impeachment trial in U.S. history.House lawmakers prosecuting the case began Thursday by walking across the Capitol and formally delivering the articles in the Senate chambers.Roberts then swore in all senators, who will act as jurors during the impeachment trial.Rep. Adam Schiff (D-California), one of the impeachment managers appointed by House Speaker Nancy Pelosi, then read the articles in their entirety. The articles allege Trump abused his presidential power by pressuring Ukraine to investigate Democratic rival Joe Biden and used military aid to the country as leverage. Trump is also charged with obstructing Congress’ ensuing probe.Watch live video of the swearing-in below.Trump has called the impeachment a "hoax." 897

Special counsel Robert Mueller's federal grand jury has been extended for up to six months.The grand jury, based in Washington, DC, was seated for an 18-month term that began in July 2017 and was set to expire in the coming days.Under federal rules, the court is able to extend a grand jury's term for another six months if it is "in the public interest."Grand jury activity is secret, except following the 23-person group's approval of criminal indictments.Chief Judge Beryl Howell of the DC District Court, who oversees the Mueller grand jury, granted the extension. She does not sit in on its sessions. 617

Robert Mueller has been subpoenaed by the House Judiciary and Intelligence Committees to testify on July 17 to address the special counsel's probe into the 2016 election. Mueller previously said that his report would act as his testimony, and he would not say anything beyond what is in the report. “The report is my testimony. I would not provide information beyond that which is already public in any appearance before Congress," Mueller said last month.In his report, Mueller found that the Trump campaign had multiple contact with the Russian government during the 2016 election. Although Mueller concluded that the Russians' involvement in the election was illegal, the Trump's campaign ties to the Russians did not amount to a criminal conspiracy. Mueller's team also investigated a number of obstruction of justice allegations involving President Donald Trump. Mueller could not make a judgment on Trump's guilt as he said that Department of Justice guidelines suggest a sitting president cannot be criminally charged. 1038

Sault Ste. Marie, Mich. — The wordsmiths at Lake Superior State University in Michigan have released LSSU's 44th annual "List of Words Banished from the Queen's English for Mis-use, Over-use and General Uselessness." LSSU's word banishment tradition is now in its fifth decade, and was started by the late W. T. Rabe, a public relations director at Lake Superior State University.Through the years, LSSU has received tens of thousands of nominations for the list, which now includes more than 1,000 entries. This year's list is comprised of nominations that come from the 589

Space is an incredible subject to study, and it wouldn’t be possible without the collection of Moon rocks and dust, as well as information about the Universe scientists have gathered.In building 31 north at the Johnson Space Center, NASA’s Lunar Lab houses some of the most famous rocks from all the Apollo missions. They have over 100,000 rocks from space.Charis Krysher, a Lunar Curation Processor for NASA, says moon rocks and space dust are the most important thing brought back to Earth.“One of the first things that we learned from the Apollo collection was how old the moon the Earth was,” Krysher says.Rocks on Earth aren’t pristine like they are on the Moon. Moon rocks don’t age, because there is no atmosphere in space to break down the rocks. The rocks found on the moon can potentially be billions of years old. “More recently we've actually learned in the past, less than a decade, that the Moon's rocks actually contain way more water than was originally realized,” the processor explains. Just like famous diamonds and jewels, there are well known space rocks, too. Like the one found by Apollo 15. “They named it the Genesis Rock, because it’s a part of the primordial crust of the moon,” she says.When studying these samples, scientists take all the precautions, from wearing bunny suits, temperature-controlled rooms and even triple bagging each rock for storing."We try really hard to preserve the rocks so that the science that we learn from the rocks can be trusted," Krysher says.It’s not every day we go to the Moon, so these scientists take time to study the rocks and do it sparingly. They are still breaking rocks over 40 years old. However, come five years from now, they’ll get another chance for more rocks when U.S. astronauts head to the moon in 2024. 1796

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