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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

(KGTV) - Are people in Mexico City really buying fake cell phones to turn over to thieves?Yes.Armed robberies have become so common on buses in Mexico City that people are buying fake iPhones to turn over to crooks.The dummy phones cost between to and have a startup screen and a piece of metal inside that give them the heft of a real phone. 358

(KGTV) - Does a photo really show a turtle with "God" spelled out on its shell?Yes.This turtle was first photographed back in 2013 by a vet clinic in Ohio.Since then, a picture of the turtle has been posted on social media repeatedly and each time it goes viral.The current version is going around Facebook with the caption "Hey look, the artist signed his name." 371

(KGTV) — If there's any time to press your luck, perhaps it's this weekend. Plus, it will only cost you a couple of bucks to do so. Saturday's Powerball jackpot hit 5 million, after several weeks without a jackpot winner. This, despite nearly 1.5 million people playing for Wednesday's draw.Saturday's winnings would be the eighth largest in the game's history. The cash option will net the winner 0.2 million if they chose that route.Players have until 7 p.m. to purchase tickets, with retails for a draw.If no one wins Saturday, the jackpot is set to rise to 0 million.Of course, winning the Powerball is an uphill battle of luck. Players have a 1 in 292.2 million chance of winning. 705

(KGTV) — A woman was charged with lying to federal agents after she was able to sneak past security at Mar-a-Lago with a thumb drive containing "malicious malware" last weekend, according to a Florida criminal complaint.Yujing Zhang, 32, lied to Secret Service agents and made it deep in President Trump's Florida property before it was discovered that she was not on the property's access list, according to ABC News.She was caught with two Taiwanese passports, four cellphones, and a thumb drive containing the malicious malware, the complaint says.Zhang reportedly told agents she was asked by a Chinese friend to try and discuss foreign policy with a Trump family member, ABC News reported. The president was not at the club during the incident.Zhang has also been charged with entering restricted grounds.An investigation by the Secret Service is ongoing.ABC News contributed to this report. 905

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