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(KGTV) -- As spring breakers get ready to flock to vacation destinations around the world, a new report shows that Mexico has some of the most dangerous cities. Tijuana is the most dangerous city in the world, according to a report by the Citizens’ Council for Public Security and Criminal Justice. The Los Angeles Times reports that five cities in Mexico are among the most dangerous in the world. The list includes Acapulco, Victoria, Juarez, Irapuato and Tijuana. RELATED: U.S. issues travel warning for Mexico ahead of Spring Break seasonIn 2018, Tijuana saw 138 homicides per 100,000 people. The report was published shortly after the U.S. Embassy & Consulates in Mexico issued a warning to people traveling for spring break. The alert warns of dangers including unregulated alcohol, sexual assault, medical emergencies and breaking the law in Mexico. According to Journey Mexico, more than 10 million people visited Mexico during the first quarter of 2018. Cancun is one of the top destinations in Mexico for spring breakers. Journey Mexico reports that nearly three million people visited the city in March of 2018. RELATED: Check today's forecast"Each year, thousands of U.S. citizens visit Mexico during Spring Break. While the vast majority of travelers have safe and enjoyable trips, Spring Break travel can sometimes include unforeseen problems," the alert read. The alert recommends that travelers check their health plans for coverage overseas or in Mexico, drink responsibly and watch drinks at all times, stick close to friends and protect personal possessions. 1590

(KGTV) -- Get your tickets, the numbers are in for the August 8 Powerball drawing. The winning numbers are: 10, 21, 30, 43, 63 with powerball 17. The estimated jackpot is 3 million with a cash value of 3 million. The next drawing will be Saturday, August 11 at 7:59 p.m.   311

(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) - If you're heading to KAABOO Del Mar this weekend, you're in for a packed schedule of musical acts and other performers that can't be missed.Here's a look at this weekend's lineups and times:FridaySunset Cliffs Stage 232

(KGTV) - Do you know what to do if you see a shark? The risk is rare, but it helps to be prepared if you plan to swim or surf at San Diego beaches.Experts have tips on how to fight off sharks in the ocean, and how to avoid encountering them in the first place!HOW TO AVOID SHARKSTips from the International Shark Attack File can keep you safe if the thought of encountering a shark terrifies you.  410

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