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(CNN) -- Scientists have discovered a "monster black hole" so massive that, in theory, it shouldn't exist.It's a stellar black hole — the type that forms after stars die, collapse, and explode. Researchers had previously believed that the size limit was no more than 20 times the mass of our sun because as these stars die, they lose most of their mass through explosions that expel matter and gas swept away by stellar winds.This theory has now been toppled by LB-1, the newly-discovered black hole. Located about 15,000 light years away, it has a mass 70 times greater than our sun, according to a press release from the Chinese Academy of Sciences.The findings were published by Chinese researchers in the journal Nature on Wednesday."Black holes of such mass should not even exist in our galaxy, according to most of the current models of stellar evolution," said Liu Jifeng, head of the team that made the discovery. "LB-1 is twice as massive as what we thought possible. Now theorists will have to take up the challenge of explaining its formation."Scientists are now scratching their heads at how LB-1 got so huge.The Chinese team has proposed a number of theories. LB-1's sheer size suggests that it "was not formed from the collapse of only one star," the study said -- instead, it could potentially be two smaller black holes orbiting each other.Another possibility is that it formed from a "fallback supernova." This is when a supernova -- the last stage of an exploding star -- ejects material during the explosion, which then falls back into the supernova, creating a black hole.This fallback formation is theoretically possible, but scientists have never been able to prove or observe it. If this is how LB-1 formed, then we may have "direct evidence for this process" for the first time, the study said.LB-1 is not the biggest black hole ever discovered -- but it may be the largest of its kind. There are several types of black holes, and stellar black holes like LB-1 are on the smaller side, according to NASA. Supermassive black holes are much bigger -- they can be billions of times the mass of our sun.Scientists believe supermassive black holes may be connected to the formation of galaxies, as they often exist at the center of the massive star systems -- but it is still not clear exactly how, or which form first.Stellar renaissanceStellar black holes are believed to be commonly scattered across the universe, but they are difficult to detect because they do not normally emit X-rays -- only doing so when they gobble up gas from a star that has ventured close enough. They are so elusive that scientists have only found, identified, and measured about two dozen stellar black holes, the press release said.The researchers at the Chinese Academy of Sciences tried a different approach. Instead of looking for X-rays emitted by black holes, the team looked for stars that were orbiting some invisible object, being pulled in by its gravity.Their efforts paid off -- they soon spotted a giant star eight times heavier than the sun, orbiting around what turned out to be LB-1."This discovery forces us to re-examine our models of how stellar-mass black holes form," said David Reitze, a physicist at the University of Florida. In May, Reitze's team made its own breakthrough discovery -- observing the never-before-seen collision of a neutron star and a black hole, which sent out ripples in space and time.These twin discoveries -- the collision, and now LB-1 -- indicate that scientists are reaching "a renaissance in our understanding of black hole astrophysics," said Reitze in the press release.There have been several other discoveries over the past year that have added to this renaissance. In October, researchers discovered what they believe to be a new type of black hole, smaller than the other kinds. And earlier this week, astronomers discovered a black hole that is actually helping baby stars grow instead of destroying them. 3971

(CNN) -- President Donald Trump in a statement on Saturday said late al Qaeda leader Osama bin Laden's son Hamza bin Laden had been "killed in a United States counterterrorism operation in the Afghanistan/Pakistan region."He did not give a time period for the operation or the death."The loss of Hamza bin Ladin not only deprives al-Qa'ida of important leadership skills and the symbolic connection to his father, but undermines important operational activities of the group," the President said in the statement.Trump also said "Hamza bin Ladin was responsible for planning and dealing with various terrorist groups."CNN previously reported on July 31 that the US believed Hamza bin Laden was dead, citing a US official. The official told CNN at the time that the US had a role in this death but did not provide details.CNN terrorism analyst Paul Cruickshank told CNN at the time that one thing puzzled researchers who are closely tracking al Qaeda: "If Hamza bin Laden has indeed been dead for months, you would expect al Qaeda to have released some form of eulogy before today. The fact they haven't is highly unusual, given his status in the group."US Secretary of Defense Mark Esper also appeared to confirm in a Fox News interview in August that Hamza bin Laden was dead.Earlier this year the US State Department called bin Laden, who was believed to be in his early 30s, an "emerging" leader in the terror group, offering a million-dollar reward for information leading to his capture.The State Department said items seized from the elder bin Laden's hiding place in Pakistan during the US Navy SEAL raid in 2011 that resulted in his death indicated he was grooming Hamza bin Laden to replace him as al Qaeda's leader.Saudi Arabia revoked Hamza bin Laden's citizenship, official newspaper Um al-Qura reported earlier this year, citing a royal order issued to the Interior Ministry. 1896

(KGTV) - Does a video really show a man driving with a car strapped onto the roof of his car?Yes.The man in Wales recently pleaded guilty to using a vehicle with a load likely to cause danger or injury.He admits his actions were stupid but says the top car was securely strapped down and a van was following him to protect other cars.He got 3 points on his license and was fined 9. 392

(KGTV) - Days after her royal wedding to Prince Harry, the Duchess of Sussex has been bestowed her very own coat of arms, Kensington Palace announced.With personal touches such as poppies representing her home state of California and wintersweet which surrounds her new home at Kensington Palace, Meghan Markle's coat of arms was designed to be both personal and representative.A blue background on the shield is meant to represent the Pacific Ocean and two golden rays signify the sunshine of California. Three quills on the shield represent communication and the power of words.RELATED: Prince Harry and Meghan Markle, Duke and Duchess of Sussex, release official Royal Wedding photosOn each side of the shield are "supporters," which include a songbird and lion wearing a crown for Markle.For wives of members of the royal family, it's tradition to have one of the supporters of their husbands in addition to their own. Markle's supporter is a songbird "as if flying and an open beak, which with the quill represents the power of communication."Markle worked closely with the College of Arms throughout the design process and her coat was approved by Queen Elizabeth.PHOTOS: Scenes from Prince Harry and Meghan Markle's?royal wedding"Good heraldic design is nearly always simple and the Arms of The Duchess of Sussex stand well beside the historic beauty of the quartered British Royal Arms," Thomas Woodcock, Garter King of Arms and Senior Herald in England, said. 1511

(KGTV) — Back to school time usually means it's time for a new backpack.Nowadays there are tons of choices in how kids can lug around their belongings. Rolling backpacks, shoulder sling options, or the traditional two-strap pack. But which one is right for them?Will it support their back? Stay together through the school year? Does it look good? These are some of the questions parents grapple with in the middle of shopping aisles.MORE: 10News back to school resources for parentsA study by UC San Diego researchers found that children commonly carry about 10 to 20 percent of their body weight in backpacks, which is also the limit recommended by the American Academy of Pediatrics.UCSD researchers tested the correlation between backpack weight and a child's back pain. They tested a group of 8 children and measured spinal pressure at three different amounts of backpack weight meant to mimic 10, 20, and 30 percent of their weight.They found that as the weight of the backpack load increases, back pain in children increases and spinal disc height shrinks as lumbar asymmetry grows.Which brings us back to the original question: How do you make sure a backpack is right for a child? A graphic from the folks at RetailMeNot have outlined how a backpack should rest on a child:Safety strapsBackpack straps are more important than kids think. Shoulder straps should be wide and padded to help distribute the pack's weight evenly, according to the website Healthy Children. Abdominal straps also help distribute weight across the waist, hips, and back.It's also recommended not to wear backpacks on only one shoulder, which shifts all that weight and leads to neck and back pain.Wearing it rightThe top of a backpack should sit one to two inches below the top of the shoulders. Also, the pack should not sit more than four inches below the waistline.The bottom of the backpack should align with the curve of the lower back.Preventing injury on the goWhile at school, its important for kids to be careful while lugging around their backpack. If possible, students should stop by their lockers often to unload any unneeded gear from their backpack. If bending down, kids should use both of their knees while wearing a backpack and not bend at the waist.Learning back-strengthening exercises can also help build up muscles primarily used while carrying weight.Consult a pediatrician if necessaryTalking with your child's doctor about back health is vital. Speak with your child as well about being vocal about back discomfort. And for parents, don't ignore complaints about back pain.If may also be worth speaking with school administrators about lightening the load of work carried around or buying separate textbooks to keep at home. 2803