Yu Jianchun, A Chinese migrant worker from Henan province with no former mathematical training and no college degree, is being hailed as a real-life version of Will Hunting, the character played by Matt Damon in the 1997 Oscar-winning film “Good Will Hunting”, after finding an alternative method to verify Carmichael numbers.

Carmichael numbers, also known as “pseudo primes”, are large numbers that only appear to be prime numbers, which are only divisible by one and themselves. They are used for credit card encryption and online payments, among other things. There are examinations that can be done to find out which numbers are prime and which are Carmichael numbers, but it’s tricky work. Apparently, a young mailman with no studies in advanced mathematics has just come up with a simpler way to verify Carmichael numbers.

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Guarding the border with North Korea is a very stressful job for the South Korean soldiers in the Demilitarized Zone that divides the two Koreas, but they recently found a very unconventional way to unwind – taking ballet lessons.

Once a week, the young soldiers of the Koran army’s army’s 25th Division switch their heavy army boots for ballet shoes and take part in a ballet class intended to relieve some of the stress of guarding the world’s most heavily fortified border. Under the guidance of Lee Hyang-jo, a ballerina at the Korean National Ballet who started teaching at the base a year ago, the young soldiers struggle to do splits pirouettes and other ballet moves, as a way of relaxing.

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Ira Saxena, a young girl from Colchester, England, can’t stop sneezing. From the moment she wakes up, she sneezes over 10 times per minute, and the unusual condition seems to be getting worse. Her mother is desperate to help, but doctors aren’t even sure what is causing the unusual sneezing bouts.

Ira’s mysterious condition kicked in one morning, three weeks ago, when Ira woke up and started sneezing. Her mother Priya says the sneezing wasn’t so bad at first, but it quickly progressed to a point where the girl wasn’t even able to attend school anymore. She now sneezes about 8,000 times per day, sometimes up to 10 times a minute, until she falls a sleep. “The one blessing is she sleeps fine, it is the only time when she is not sneezing and she can sleep right through the night,” her mother said.

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For the last three years, a mystery philanthropist has been hiding $100 bills in and around the city of Salem, Oregon. A total of $50,500 worth of bills has been reported so far, but the true donated sum could be much larger.

The first hidden $100 bills were found at stores and events in Salem in May 2013, and new ones have been surfacing regularly ever since. As soon as local news network started covering the phenomenon, a number of people came out to claim responsibility for the generous act, so to make sure no one tried to steal his thunder again, the anonymous benefactor started signing the bills. A couple of people claiming to be his friends came forward to act as liaisons and confirm his signature, but they never revealed his identity, and always made sure to emphasize that this wasn’t about him, but about helping people in need and inspiring others to do the same.

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Springbone Kitchen, a New York restaurant famous for its trendy bone broth, has found a way making the meaty liquid appealing even when it’s hot outside by turning it into a popsicle.

The bone broth diet trend has been around for a while, but it really picked up steam last winter when celebrities like Gwyneth Paltrow, Salma Hayek and Shailene Woodley revealed they were big fans. Soup-themed stores and eateries started popping up in major U.S. cities and Dr. Kellyann’s “Bone Broth Diet” book became a bestseller, with many health dieters relying on the meat-flavored soup as a meal replacement. But while it’s understandable that the hot broth became popular during the cold winter months, it’s a lot harder to sell when it’s 90 degrees Fahrenheit outside.

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After the International Court in Hague ruled that China has no historical claims to the the South China Sea and is breaching the sovereignty of the Philippines by exploring resources, Chinese citizens started showing their support for their country by boycotting American brands like Apple and KFC.

Soon after the landmark decision was reported by national news outlets, photos and videos of smashed up iPhones started showing up on Chinese social media. But what do the United States and Apple have to do with a conflict between China and the Philippines, you may ask. The U.S. is seen as a strong ally of the Philippines and since the Apple iPhone is apparently considered the ultimate American product, it became a prime target for people to direct their anger against.

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For hundreds of years, fishermen in Taiwan have been catching sardines with the help of fiery stick held over the edge of a boat. The fish are so attracted to the light that they jump out of the water and into the nets of the fishermen.

Fire fishing is as simple as it is mesmerizing. Fishing boats head out to sea during the night, and light up a bamboo stick covered with sulfuric soil at one end to create a bright flame. The sulfur dissolves in the water and the gas produced then flashes with fire. Drawn to the light spectacle, sardines jump out of the water by the hundreds at a time and end up in the fishermen’s nets. Sulfuric fire fishing was developed during the period of Japanese Rule and is now practiced only in the Jinshan sulfur harbor.

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New Zealand-based tattoo artist Steve Butcher specializes in hyper-realistic tattoos that look like they’ve been printed on the skin instead of hand inked with a tattoo gun.

Working out of Matt Jordan’s Ship Shape Tattoo studio, in West Auckland, Butcher is one of the most in demand tattoo artists at conventions all around the world, and looking at his work, it’s easy to see why. Whether he’s doing portraits of NBA stars, animals or flowers, the end result is always breathtaking. His designs are perfect down to the smallest details, as he always seems to nail even the toughest elements like tiny drops of sweat, hair or reflections in the eyes of his characters.

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All astronauts have perfect eyesight before traveling to outer space, but some years ago medical tests revealed that their vision is severely impaired when they return. The exact cause of this problem is yet to be determined.

In 2005, about halfway through his mission working on the International Space Station, astronaut John Phillips looked out the window at Earth and noticed something strange. Although his vision had always been perfect, our planet seemed blurry and he had problem focusing on it. He didn’t report his problem to ground control thinking it was just temporary and would go away after a while, only it didn’t. When he returned to Earth, rigorous tests revealed that his eyesight had gone from 20/20 to 20/100.

To shed some light on this issue, NASA put Phillips through a series of procedures, including MRIs, retinal scans, neurological tests and a spinal tap. They found that not only had his vision deteriorated, but his eyes had changed as well – his optic nerves were inflamed, the back of his eyes had become flatter and his eyeballs had choroidal folds, which are like stretch marks. After six months, Phillips’ eyesight improved to 20/50, but remained there for the last 11 years. He went from being the guy with the best vision, the first one in the car to read a street sign to not being able to pass a DMV exam without glasses.

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Patrick Magno, from San Diego, California, recently won the grand prize in a fitness competition after he managed to lose 49 pounds and get into enviable physical shape in just three months.

After a medical exam revealed that he was 30 per cent body fat and at high risk of developing type 2 diabetes, Patrick Magno decided it was time for a drastic lifestyle change. He was a social worker and had to remove children from broken homes, abusive parents and other harmful situations for a living, a job that he says had a severe effect on his lifestyle and overall health. So he quit, proposed to his girlfriend of six years and set his sights on improving his health so he wouldn’t end up like his father, who had to deal with the terrible symptoms of diabetes.

“I couldn’t even recognize myself,” he said. “I was embarrassed. I was disgusted. I was ashamed that I had let myself get to this point.” So when he learned about Bodybuilding.com’s 250k Challenge, a contest that has entrants transform their bodies with the help of grueling physical workouts, meal-plans and supplements, for the chance to win a substantial sum of money, he decided to go all in. ‘hey said they would give tons of nutritional meal plans, options, workout guides and fitness advice absolutely free of charge, and offer a $250,000 (£190,000) in prize money. It sounded a little too good to be true,” Magno remembers.

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Artist Song Peilun is being hailed as “The Father of Yelang Valley” after spending the last two decades turning a forested patch of land into an artistic village as a tribute to the ancient civilization that once thrived in the area.

Yelang was an ancient political entity first described in the 3rd century BC centered in what is now western Guizhou province, China. Experts believe that many ancient cultures were rooted here, but there are unfortunately no architectural remnants left standing in the great valley. Inspired by Crazy Horse, a mountain monument dedicated to a Native American warrior, in the US state of South Dakota, after visiting the United States, Chinese artist Song Peilun dedicated his life to building a memorial to the artistic heritage of Yelang Valley and restoring part of its former glory.

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An Indonesian woman who went to great lengths to impersonate a man and even married another woman was recently detained by police after “his” wife alerted authorities about the deception.

40-year-old Surwati, who like most Indonesian goes by a single name, admitted to falsifying her identity and impersonating a man. She had taken the name Muhamad Efendi Saputra and told people “he” was a police officer. Her male impersonating skills were apparently stellar because she managed to full everybody and even convinced a woman into marriage. After a whirlwind romance lasting a couple of months, Muhamad married 25-year-old Heniyati in a ceremony on Java island. To avoid raising any suspicions, Surwati reportedly hired a number of people to pose as relatives of her male alter ego at the wedding.

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It might sound like a silly idea, but it turns out that drawing eyes on the rumps of cattle might deter lions from attacking and prevent human retaliation against the mighty predators.

It sounds like a strategy to protect the poor cattle, but the idea is actually to protect endangered African lions from human retaliation. The majestic felines are on the IUCN Red List of Threatened Species, with numbers currently in the range of 23,000 to 39,000 and rapidly declining. “As protected conservation areas become smaller, lions are increasingly coming into contact with human populations, which are expanding to the boundaries of these protected areas,” says Dr Neil Jordan, a conservation biologist from UNSW’s Centre for Ecosystem Science. The lions attack livestock, and with no non-lethal way of protecting their livelihood farmers often shoot or poison the predators in retaliation.

To help humans and their cattle coexist with lions, Jordan has come up with a low-cost strategy that he hopes will prevent attacks and retaliatory violence. The idea behind painting a pair of intimidating eyes on the rumps of cows is that they will trick the lions into thinking they’ve been spotted, causing them to abandon the hunt. Scientists know that being seen can deter some species from attacking their prey. For example, Indian woodcutters have long been wearing worn masks on the back of their heads to trick man-eating tigers that they’ve been spotted, and butterflies with eye-patterns on their wings ward off predatory birds.

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Computer geeks spend ridiculous amounts of money on high-end rigs all the time, but one digital electronics engineer from Cambridge, England, poured a small fortune into building a giant computer that he only uses to play Tetris.

James Newman’s supercomputer took five years to build, cost over $53,000 and takes up an entire room, yet it is a million times slower and has a million times less memory than a typical desktop. That’s because it’s actually just a mega microprocessor. “Computers are quite opaque, looking at them it’s impossible to see how they work. What I would like to do is get inside and see what’s going on,” Newman explains on the Megaprocessor project website. “Trouble is we can’t shrink down small enough to walk inside a silicon chip. But we can go the other way; we can build the thing big enough that we can walk inside it. Not only that we can also put LEDs on everything so we can actually SEE the data moving and the logic happening.” And that’s exactly what he spent the last five decades doing. As of June 22, the Megaprocessor is finally complete.

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Tom Currie, a 24-year-old Pokemon fan from New Zealand, recently quit his job so he could spend the next two months traveling all around the country to hunt all the Pokemon in the mobile game phenomenon Pokemon Go.

Currie was working at a Hibiscus Coast cafe in Auckland when he decided that in order to become the best Pokemon Go hunter the world has ever seen he would need to quit and focus all his attention on the app. Every morning, he fills up his flask with coffee, packs his lunch and heads out looking for new Pokemon to collect. He has already booked bus trips to various destinations around New Zealand, from Invercargill in the country’s South Island all the way up to Cape Reinga in North Island. When Newshub interviewed him two days ago, Tom had already managed to capture 90 of the 151 Pokemon released in the popular Nintendo app.

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