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Math enthusiasts know all about it, and the rest of the population is probably hoping for cherry pie.But March 14 is Pi Day. While last year stretched the symbolic celebration out a little longer -- to 3.1415 -- each year presents ample opportunity for learning.To 31 decimal places, the celebrated irrational number that never ends is 3.1415926535897932384626433832795.A few more tidbits about pi and Pi Day:About piPi is the ratio of the circumference of a circle to its diameter. It's not equal to the ratio of any two whole numbers, so an approximation -- 22/7 -- is used in many calculations.Pi is essential in architecture and construction and was used frequently by early astronomers. Pi has been known for about 4,000 years, but it started to be called by the Greek letter only in the 1700s.The origin of Pi DayPi Day started 30 years ago at San Francisco's Exploratorium.Physicist Larry Shaw, who worked in the electronics group at the museum, started celebrating pi on March 14, 1988, primarily with museum staffers. The tradition has grown to embrace math enthusiasts from all walks of life.For more about pi, visit www.piday.org. 1159

Mark Kelly, a former astronaut and husband of former Rep. Gabrielle Giffords, was sworn in as a U.S. senator on Wednesday afternoon.Kelly, a Democrat, defeated Sen. Martha McSally in a November special election. McSally had been appointed by Gov. Doug Ducey to serve in the seat once occupied by Sen. John McCain, who died in 2018.Because Kelly was elected in a special election, he is being sworn in ahead of newly-elected Senators, who will assume their roles early next year.Kelly's seat is one of three Democrats flipped on election day, while Republicans were able to flip one seat back into their control. Control of the chamber remains dependant on the outcome of two runoff elections in Georgia, which will take place in January.During his NASA career, Kelly flew four missions to space and totaled more than 54 days outside of the Earth's atmosphere. His twin brother, Scott, is also an astronaut.Kelly's first foray into politics came via his wife. Giffords was first elected as a congresswoman in 2006, but in 2011, a gunman shot her in the head during an assassination attempt. She survived the shooting but resigned her seat in early 2012 to focus on the recovery.Kelly is at least the second former astronaut to serve in the U.S. Senate, following in the footsteps of John Glenn, who was the first man to orbit the earth and served as a senator representing Ohio from 1974 to 1999. 1403

LOUISVILLE, Ky. -- Senate Majority Leader Mitch McConnell says there will be a peaceful transfer of power if Joe Biden wins the 2020 presidential election.When asked by WLEX's Karolina Buczek if a peaceful transfer of power would take place once the election is settled and the former vice president ends up winning the Electoral College, McConnell responded with "of course" on Friday. 394

MARINE CORPS AIR STATION MIRAMAR, Calif. - (KGTV) - The U.S. Marine Corps identified Thursday the serviceman found dead of a gunshot wound this week at MCAS Miramar.The body of Lance Cpl. David M. Gonzalez was discovered Monday afternoon at the armory on base.Military officials say no foul play is suspected and the death is under investigation.Gonzalez, 20, was assigned to Marine Tactical Air Command Squadron 38. He served as a small arms repair technician.Gonzalez joined the service in December 2016 and had never deployed. 537

MEXICO CITY— The U.S. State Department has issued a travel warning for Mexico following reports that eight bodies were found in the resort town of Cancun.According to Newsweek, the bodies of a man and woman were found in the trunk of an abandoned taxi early Monday, and the bodies of two other men were found dismembered in plastic bags at a nearby location.A fifth man was reportedly found bound and shot to death on Tuesday, a sixth man was "murdered in a hammock," a seventh person was shot and left covered by a bag, and the eighth victim was found decapitated in a Tres Reyes neighborhood. 607

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