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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) -- Lifeguards in Huntington Beach, California, were reminding swimmers to shuffle their feet when they go into the ocean after 176 people were stung by stingrays in just one day.A record number of people were stung on Saturday, authorities told CNN affiliate KTLA.It may sound like a scene from a monster movie, but the rays weren't on a stabby rampage attacking beachgoers' lower legs.Warm weather brought lots of people to the beach during low tide."When you have people in the water with lower tides like that, they make their way out to where the stingrays reside and, unfortunately, people step on the stingrays and that's when they get stung," Lt. Eric Dieterman of the fire department's Marine Safety Division told KTLA.Lifeguards had people soak their injuries in bags of warm water to help ease the pain from the stings.There were fewer people in the water on Sunday after the weather got cooler, KTLA reported, and the number of stings went down.Dieterman said lifeguards warned people to stay out of the water through Monday.Stingrays are flat, bottom-dwellers that like to hang out partially covered in the sand in shallow, temperate waters.Their primary defense is camouflage, but they will sting if stepped on or disturbed. That's why experts recommend swimmers shuffle their feet when they walk in the water to produce vibrations that scare the rays away.Stingray injuries can usually be treated with warm water, antibiotics to prevent infections and possibly a tetanus shot, according to SeaGrant California. In rare cases, a doctor may have to remove a stinger if it breaks off in the wound.Legendary television star and conservationist Steve Irwin died in 2006 when a stingray barb went into his chest while he was filming a documentary in Australia.Huntington Beach resident Lee Perkins told KTLA that he was stung two weeks ago and that the wound got infected."It's definitely a searing nerve pain and it's pretty intense," Perkins said.Perkins said he's grateful that his 10-year-old son, who was swimming nearby, wasn't stung. 2062

(KGTV) -- A North San Diego County couple said they were promised plane tickets for an extremely low price, but when they paid up, they were left with nothing. Robert, who declined to use his last name, loves to travel with his fiancé. In October, he said they got an invitation in the mail to listen to a timeshare presentation.“If you [go], you’re offered one of several gifts—a cruise, a TV, an iPad, and so forth,” Robert said.They decided to check it out, although they knew they just wanted the gift. He said after the presentation, the couple declined the timeshare, but they were entered into a raffle in which they received the cruise with two airline tickets.Robert was only interested in the plane tickets, so they filled out the required paperwork and paid the fee attached to the prize. “It’ll charge you for the both of you, for both of your tickets,” he said.PDF: Read correspondence between Team 10 and My Ultimate Getaway Robert mailed the money with the forms and waited. Instead of receiving tickets, Robert said he instead got more paperwork to enter another program. “You have to sign up [on] a website and then you have to pay to get discounted tickets,” Robert said. “We’re like, what’s going on? These are not free tickets.”The return address on the envelope he received came from “My Ultimate Getaway.” According to the pamphlet, it said: “In order to keep your promotional vacation reserved for a full year, you must register and submit your vacation request for online.” It also asked for a “booking fee of .95.”Robert told Team 10 there was no mention of signing up for a program to get these plane tickets and said “100 percent” they were told it was free.The couple felt misled. They complained to the Better Business Bureau out of Virginia where My Ultimate Getaway has a listed address. Team 10 spoke to another woman from Kansas who said she also gave money with the promise of plane tickets.“We wrote the check for to this Getaway place September the 14th,” said Kathy, who did not want to use her last name. Instead of plane tickets, she “finally got something in the mail. They wanted more money.” BBB records show the man behind My Ultimate Getaway and another similar business called Hot Promotional Vacations out of Maryland is Charles Colvin, also known as Charles Colvin Lemley. A search of state records found Charles Lemley listed as president of My Ultimate Getaway and owner of Hot Promotional Vacations. Robert said he emailed Colvin and showed Team 10 an email where he responded “he would be refunded as soon as possible.” That was mid-January. “We’ve been patient,” Robert said. When Team 10 questioned Colvin regarding My Ultimate Getaway, he responded via email: “We provide gift incentives to companies to market their products or services, nothing more.” He blamed the companies for giving “a false impression that these gifts are free.”When pressed on who the companies are and why he is doing business with them if they are giving a “false impression” to customers, he did not answer that question.Colvin told Team 10 in an email on February 20th that he processed the refund and the couple would “receive it in a couple of days.” After Team 10 got involved, Robert said they received their refund Feb. 26. Robert regrets opening that first piece of mail and hopes to stop others from making his mistake. “If you promise something, please give the customer what they want,” he said. “They get nothing in return except headaches.”The Better Business Bureau suggests when dealing with vacation or travel: Be wary of “great deals” and low- priced offers. Be suspicious of companies that require you to wait at least 60 days before taking your trip. Ask detailed questions. Get all information in writing before you agree to buy. Don’t give your credit card number or bank information over the phone unless you have confidence in the company you are dealing with. Don’t send money by messenger or overnight mail. Check out a company with the Better Business Bureau before you buy. Don’t be pressured into buying. If in doubt, say “NO.” 4107

(CNN) -- It was an impressive disguise: the snow-white beard, the oversized glasses, the wheelchair.But it was when the seemingly frail and elderly passenger reached security at New Delhi's Indira Gandhi International Airport -- India's busiest airport -- that he caught the attention of staff.At around 10.45 p.m. on the evening of September 8, the individual was hoping to get on an overnight flight to New York."He posed as if he was very old and incapacitated," Shrikant Kishore, a senior official with the Central Industrial Security Force, told CNN.Dressed in a white tunic and trousers, with a white turban and black slippers, the passenger proved reluctant to be frisked."Our screener asked the person in the wheelchair to stand. He said that he cannot stand. Our screener asked if he would stand with support. He reluctantly stood up."That's when the officer noticed that while the passenger's beard and hair were white, the roots were black. He also was working hard to avoid the officer's eyes.When asked for his passport, the individual handed over documentation claiming that he was Amrick Singh, born in Delhi in February 1938, making him 81 years old."He was definitely not 80 years old. His skin was of a younger person," Kishore told CNN.Upon further questioning, the man told security staff that he was, in fact, 32-year-old Jayesh Patel, a resident of Gujarat state.As he was holding a fake passport, he was detailed by security and handed over to immigration authorities.Kishore told CNN that he doesn't know what the current status of the case is or the reason behind the impersonation.Indira Gandhi International Airport, commonly known as Delhi Airport, is the 12th busiest airport in the world, with close to 70 million passengers traveling through it in 2018. 1792

(KGTV) - Did NASA really say that February 10th was the only day you can make a broom stand on its own?No.Many people posted videos of themselves balancing a broom on its end.But you can do that any day. There was no special gravitational pull on that date and NASA never claimed there was.A broom typically has a low center of gravity. So if you stand it on end and spread the bristles just right, you can form a tripod-like structure which will hold up the broom. 473